| Term | Definition |
| heretofore | until now |
| heriot | payment to feudal lord upon death of tenant farmer |
| hérissé | bristled |
| herisson | swinging beam bearing iron spikes |
| herm | head or bust of Hermes with a big wang on a square base |
| hermeneutic | of, like or pertaining to the interpretation of passages |
| hermetic | of, like or pertaining to sorcery or alchemy |
| heroarchy | government by heroes |
| heroon | temple to a hero; temple-shaped tomb |
| herpetic | creeping |
| herpetiform | resembling or shaped like a reptile |
| herpetoid | of, like or pertaining to snakes |
| herpetology | study of reptiles and amphibians |
| herpetophobia | fear of snakes |
| herringbone | twilled fabric woven in rows of parallel sloping lines |
| hesternal | of, like or pertaining to yesterday |
| hesternopothia | yearning for yesterday or earlier times |
| hesychastic | keeping silence; soothing or quieting |
| hetaera | paramour; prostitute; concubine |
| hetaerocracy | government by paramours |
| hetairism | concubinage; system of communal marriage |
| heterarchy | government by a foreign ruler |
| heterism | variation |
| heterochrony | divergence from normal time sequence |
| heteroclitous | irregularly inflected |
| heterodymus | conjoined twins with two heads and torsos but one pair of legs |
| heterodyne | interference due to different wave frequencies |
| heteroecious | parasitism upon several hosts |
| heteroepy | irregular or non-standard pronunciation |
| heterogenesis | spontaneous or alternate generation |
| heterology | differences due to different origin |
| heteronomous | subject to different or foreign laws |
| heteronym | word having same spelling but different sound and meaning |
| heteropathy | excessive sensitivity |
| heterophemy | accidental use of word different from that meant |
| heteroscian | dweller of a temperate zone |
| heterotaxis | anomalous arrangement of body parts |
| heterothermal | taking the temperature of the surroundings |
| heterotrichosis | having hair of varied or mixed colours |
| heterotropic | squinting |
| heuristic | helping to discover by trial and error |
| hexactinal | having six rays |
| hexaemeron | period of six days of creation |
| hexamerous | having six parts |
| hexametromania | mania for writing in hexameter |
| hexastichal | having six lines or rows |
| hexeris | galley with six rows of oars |
| heyday | expression of elation or wonder |
| hiant | gaping |
| hibernaculum | winter retreat |
| hibernal | of, like or pertaining to winter |
| hidation | measuring or assessing land by hides |
| hide | old unit of land area equal to 120 acres |
| hidrotic | causing or exuding sweat |
| hiemal | of, like or pertaining to winter |
| hieratical | priestly; bound by religious convention |
| hierocracy | government by priests or religious ministers |
| hierodule | temple slave |
| hierogram | sacred or hieroglyphic symbol |
| hierography | description of sacred things |
| hierolatry | worship of saints or sacred things |
| hierology | science of sacred matters |
| hieromachy | fight or quarrel between priests |
| hieromancy | divination by studying objects offered in sacrifice |
| hieromania | pathological religious visions or delusions |
| hieromonach | monk who also serves as a priest |
| hieropathic | pertaining to a strong love of the clergy |
| hierophant | one who shows or reveals sacred things |
| hierophobia | fear of sacred things |
| hieroscopy | divination using entrails |
| hierurgy | sacred performance |
| highbinder | a scheming or corrupt politician |
| hight | named; called; to command or call |
| hilasmic | propitiatory |
| himation | loose outer garment worn by ancient Greeks |
| hindermate | companion who is a hindrance |
| hindforemost | with the back part in the front place |
| hinnable | able to neigh or whinny |
| hiplings | with the hips foremost |
| hipparchy | rule or control of horses |
| hipped | melancholy; peevish; offended |
| hippiatric | of, like or pertaining to the treatment of horses' diseases |
| hippiatrics | study of diseases of horses |
| hippic | of, like or pertaining to horses |
| hippocras | medieval hot spiced wine |
| hippocrepian | horseshoe-shaped |
| hippocrepiform | shaped like a horseshoe |
| hippodamist | horse-tamer |
| hippoid | equine; of, like or pertaining to horses |
| hippology | the study of horses |
| hippomancy | divination using horses |
| hippomania | obsession with horses |
| hippometer | instrument to measure height of horses |
| hippomobile | horse-drawn vehicle |
| hippophagy | feeding on horses |
| hippophile | lover of horses |
| hippophobe | hater of horses |
| hircine | goat-like; having a goatish smell; of, like or pertaining to smelly goats |
| hircismus | stinky armpits |
| hircosity | goatishness |
| hirrient | roughly trilled |
| hirsute | having or covered with coarse shaggy hair |
| hirsuties | hairiness |
| hirudine | of, like or pertaining to leeches |
| hirudinean | of, like or pertaining to leeches |
| hirundine | of, like or pertaining to swallows |
| hispid | rough with or covered with strong hairs or bristles |
| hist | expression used to attract attention |
| histogenesis | the formation or differentiation of tissues |
| histology | study of the tissues of organisms |
| histopathology | study of changes in tissue due to disease |
| historicism | belief that all phenomena are historically determined |
| historiography | study of writing history |
| historiology | study of history |
| histrionic | of, like or pertaining to the stage or actors |
| hither | to this place |
| hithermost | nearest on this side |
| hitherside | the nearest side |
| hoary | pale silver-grey colour; grey with age |
| hobbish | clownish |
| hobbledehoy | awkward; gawky youth |
| hobnail | thick and strong nail for shoeing horses |
| hobohemia | community of hoboes |
| hod | V-shaped trough for carrying bricks or mortar on the shoulders |
| hodden | coarse undyed woollen cloth |
| hodiernal | of, like or pertaining to the present day |
| hodometry | measurement of distance of a sea voyage |
| hodoscope | instrument for tracing paths of ionizing particles |
| hoggaster | young sheep, hog, or boar |
| hogget | one-year-old sheep or colt |
| hoggin | sifted gravel |
| hogmanay | gift or cake made on New Year's Eve |
| hogshead | unit of capacity equal to 63 gallons |
| holderbat | clamp fixed around sides of pipe |
| holism | belief that fundamental universal principle is creation of wholes |
| holland | coarse plain-woven cotton or linen |
| holm | island in a river |
| holobaptism | belief in baptism with total immersion in water |
| holobenthic | passing entire life in the deep ocean |
| holocryptic | inscrutable; undecipherable |
| holograph | text written entirely in its author's handwriting |
| holophrase | single word expressing sentence or phrase |
| holoptic | having the eyes meeting in front |
| holosteric | totally solid |
| holt | woody hill or grove |
| holystone | sandstone material used to scrape ships' decks |
| homaloidal | of the nature of a plane; flat; plane-shaped |
| homarine | of, like or pertaining to lobsters |
| homeomerous | composed of similar parts |
| homeoteleuton | the use or occurrence of similar endings |
| homichlophobia | fear of fog |
| homiletical | of, like or pertaining to homilies |
| homiletics | the art of preaching |
| homiliary | book of sermons |
| hominiform | shaped like a human |
| hommock | ridge in an ice field |
| homnivorous | eating humans |
| homocentric | having the same central or focal point |
| homochiral | identically shaped |
| homodont | having teeth all alike |
| homograph | words spelled the same but of different meaning |
| homoiousia | similarity but not identicality in substance |
| homolegomena | books of the Bible used in early Christianity |
| homologate | to confirm; to agree; to ratify |
| homomerous | possessing similar parts or components |
| homonym | words having the same sound but different meanings |
| homoousia | identicality in substance |
| homophile | one who prefers the company of the same sex; a homosexual |
| homophobia | fear of homosexuals |
| homophyly | resemblance due to common ancestry |
| homoplasty | resemblance due to convergent evolution |
| homotaxic | arranged in a similar manner |
| honorificabilitudinity | honourableness |
| hoplarchy | government by the military |
| hoplite | a heavily armed Greek foot soldier |
| hoplology | the study of weapons |
| hoplomachy | fighting while heavily armoured |
| hopple | to restrain by tying the feet together |
| hopsack | rough-surfaced loose fabric |
| hora | circle dance |
| horal | of, like or pertaining to hours; hourly |
| horary | of, like or pertaining to an hour; continuing for an hour; hourly |
| hordeaceous | of, like or pertaining to barley |
| hordeiform | shaped like a barleycorn |
| horme | goal-directed or purposive behaviour |
| hornbook | rudimentary treatise |
| hornito | low oven |
| hornpipe | lively British folk dance |
| hornwork | cuckoldry |
| horography | art of constructing sundials or clocks |
| horology | science of time measurement |
| horometry | time measurement |
| horrent | bristling |
| horrescent | expressing or showing horror |
| horripilation | process causing goose-bumps |
| horrisonant | dreadful-sounding |
| hortatory | giving exhortation or advice |
| hortensial | of, like or pertaining to gardens |
| hortulan | of, like or pertaining to gardens |
| hospitate | to greet; to welcome |
| hospitium | hospice |
| hotchpot | aggregation of property prior to equal division among heirs |
| houghmagandy | fornication |
| houndstooth | fabric with an irregular checked pattern |
| hourd | timber gallery on summit of castle tower |
| housal | belonging to the house |
| housel | the eucharist; the act of taking the eucharist |
| howbeit | although |
| howdah | seat with a canopy erected on an elephant's back |
| hoy | large one-decked boat |
| hoyden | tomboy |
| huckaback | absorbent cotton or linen used for towels |
| huggery | the action of hugging |
| huitain | group of eight lines of verse |
| hula | sinuous Polynesian dance with rhythmic hip movements |
| hulchy | swollen |
| humanism | belief that human interests and mind are paramount |
| humanitarianism | doctrine that the highest moral obligation is to improve human welfare |
| humect | to moisten; to cause to become moist |
| humectation | moisture |
| humgruffin | terrible person |
| humicubation | act of lying on the ground penitently |
| humify | to moisten |
| hummock | pile or ridge of ice |
| humoral | of, like or pertaining to body fluid |
| humpenscrump | crude musical instrument like a hurdy-gurdy |
| hustle | lively disco dance derived from swing elements with a plus-like pattern |
| hwyl | emotional state capable of arousing intense eloquence |
| hyacinthine | of a blue or purple colour |
| hyaline | glassy, of or like glass, transparent |
| hyalography | engraving upon glass |
| hyaloid | of, like or pertaining to glass |
| hyalopterous | having glassy or transparent wings |
| hydatoid | watery |
| hydragogue | removing water or serum |
| hydrargyrism | mercury poisoning |
| hydric | of, like or pertaining to an abundance of moisture |
| hydriotaphia | burial in an urn |
| hydrobiology | study of aquatic organisms |
| hydrodynamics | study of movement in liquids |
| hydrogenic | caused or formed by water |
| hydrogeology | study of ground water |
| hydrognosy | historical account of water surfaces of the earth |
| hydrography | study of investigating bodies of water |
| hydrokinetics | study of motion of fluids |
| hydrology | study of water resources |
| hydromancy | divination using water |
| hydromania | irrational craving for water |
| hydrometeorology | study of atmospheric moisture |
| hydrometer | instrument for measuring specific gravity of liquids |
| hydropathy | study of treating diseases with water |
| hydropathy | treating diseases with water |
| hydrophanous | becoming transparent when placed in water |
| hydrophilous | loving or preferring water |
| hydrophobia | fear of water |
| hydropic | dropsical; thirsty |
| hydroscope | instrument for viewing under water |
| hydroscopist | one who divines sources of fresh water |
| hydrospace | regions beneath the oceans' surface |
| hydrotaxis | movement towards or away from water |
| hydrotimeter | instrument for measuring water hardness |
| hyetal | rainy; of, like or pertaining to rainfall |
| hyetograph | instrument for recording rainfall |
| hyetology | science of rainfall |
| hyetometer | instrument for measuring rainfall |
| hyetometrograph | instrument for recording rainfall |
| hygeian | of, like or pertaining to health; healthy |
| hygeiolatry | excessive devotion to health |
| hygiastics | science of health and hygiene |
| hygiology | hygienics; study of cleanliness |
| hygric | of, like or pertaining to water or moisture |
| hygrograph | instrument for recording variations in atmospheric humidity |
| hygrology | study of humidity |
| hygrometer | instrument for measuring air moisture |
| hygrometry | science of humidity |
| hygrophilous | preferring or living where there is an abundance of moisture |
| hygroscope | instrument for displaying changes in air humidity |
| hygrostat | machine for regulating humidity of air |
| hylactic | barking; in a barking manner |
| hylarchic | ruling over matter |
| hyle | matter |
| hylicism | materialism |
| hylobatine | of, like or pertaining to gibbons |
| hylogenesis | the origin of matter |
| hylomania | excessive tendency towards materialism |
| hylomorphism | belief that matter is cause of the universe |
| hylopathism | belief in ability of matter to affect the spiritual world |
| hylophagous | eating wood |
| hylotheism | belief that the universe is purely material |
| hylotomous | wood-cutting |
| hylozoism | doctrine that all matter is endowed with life |
| hymeneal | of, like or pertaining to marriage |
| hymnal | collection of church hymns |
| hymnody | hymns collectively; hymn-singing |
| hymnography | study of writing hymns |
| hymnology | study of hymns |
| hyoid | having a "U" shape |
| hypactic | purgative |
| hypaethral | roofless; open to the sky |
| hypalgesia | diminished susceptibility to pain |
| hypallage | figure in which relations between words are changed |
| hypaspist | shield-bearing elite soldier |
| hyperacusis | abnormally good sense of hearing |
| hyperalgia | extreme sensitivity to pain |
| hyperanarchy | condition of extreme anarchy |
| hyperaphia | extraordinarily keen sense of touch |
| hyperarchy | excessive government |
| hyperbaton | rhetorical device in which word order is reversed |
| hyperbole | impression by extravagant exaggeration |
| hyperborean | an inhabitant of the extreme north |
| hyperbulia | excessive zeal for action or activity |
| hypercatalectic | having an extra syllable on the end of a line of verse |
| hypercathexis | manic desire for a particular object |
| hyperdulia | veneration of the Virgin Mary above saints and angels |
| hyperemesis | excessive vomiting |
| hypergamy | marriage of a man to a woman of lower status |
| hyperhidrosis | excessive sweating |
| hypermania | severe mania |
| hypermetropia | long-sightedness |
| hypernym | word representing a class of words or things |
| hyperope | far-sighted person |
| hyperosmia | very keen sense of smell |
| hyperphagia | eating too much |
| hyperpyrexia | excessive body temperature |
| hypertrichologist | person who treats unsightly facial hair |
| hyphaeresis | omission of sound or letter from a word |
| hypnagogic | sleep-inducing; pertaining to drowsiness or sleep |
| hypnoetic | of, like or pertaining to unconscious logical thought |
| hypnogeny | production of the hypnotic state |
| hypnoid | like sleep or hypnosis |
| hypnology | study of sleep; study of hypnosis |
| hypnomancy | divination using sleep |
| hypnomogia | insomnia |
| hypnopompic | of, like or pertaining to period between sleep and wakefulness |
| hypnosophy | knowledge of phenomena relating to sleep |
| hypobole | anticipating and refuting objections to an argument |
| hypobulic | weak-willed; lacking willpower |
| hypocaust | space under floor for heating by hot air |
| hypocorism | pet-name; diminutive or abbreviated name |
| hypodynamia | loss of strength |
| hypogeal | underground |
| hypogeiody | surveying underground |
| hypogeum | underground chamber |
| hypogeusia | diminished sense of taste |
| hypolimnion | colder and deeper layer of water in a lake |
| hypomania | minor mania |
| hypometropia | shortsightedness |
| hyponychial | underneath fingernail or toenail |
| hyponym | term which is a member of a larger class |
| hypophrenia | weakness of mental facilities |
| hypostasis | basis; foundation; essence |
| hypostrophe | return to primary argument after digression |
| hypostyle | pillar |
| hypotaxis | dependent construction |
| hypothecary | of, like or pertaining to mortgages |
| hypothecate | to mortgage; to place as security |
| hypotrichosis | hairlessness |
| hypotyposis | vivid description of a scene |
| hypsiloid | shaped like the Greek letter upsilon |
| hypsography | science of measuring heights |
| hypsometer | instrument for measuring height of trees through triangulation |
| hypsophobia | fear of high places |
| hypural | situated beneath the tail |
| hyrax | shrew |
| hysteresis | lagging of an effect behind its cause |
| hysterogenic | causing hysteria |
| hysteroid | like or resembling a womb |
| hysteromania | nymphomania |
| hystricine | of, like or pertaining to porcupines |
| iamatology | study of remedies |
| iamb | poetic foot consisting of short then a long syllable |
| ianthine | violet-coloured |
| iatraliptic | relating to the curing of diseases by means of unguents |
| iatramelia | medical negligence |
| iatrarchy | government by physicians |
| iatrochemistry | application of chemistry to medical theory |
| iatrogenic | induced inadvertently by medical treatment |
| iatrology | treatise or text on medical topics |
| iatromathematics | archaic practice of medicine in conjunction with astrology |
| iatrophobia | fear of going to the doctor |
| ibidem | in the same place |
| iceblink | glare in the sky caused by light reflected off ice |
| ichneumous | parasitical |
| ichneutic | of, like or pertaining to a tracker or tracking |
| ichnite | fossilized footprint |
| ichnogram | footprint |
| ichnography | art of drawing ground plans |
| ichnology | science of fossilized footprints |
| ichnomancy | divination using footprints |
| ichthyic | of, resembling or pertaining to fish |
| ichthyoid | fishlike |
| ichthyolatry | the worship of fish |
| ichthyology | study of fish |
| ichthyomancy | divination by inspecting fish entrails |
| ichthyomorphic | shaped like a fish |
| ichthyophagous | fish-eating |
| ichthyopolist | fish seller |
| iconoclasm | attacking of established beliefs |
| iconography | study of drawing symbols |
| iconolagny | sexual stimulation from pictures or statues |
| iconolatry | image-worship |
| iconology | study of icons; symbols |
| iconomachy | opposition to the worship of images or icons |
| iconomancy | divination using icons |
| iconomania | obsession with icons or portraits |
| iconomatic | using pictures to represent sounds of words |
| iconometer | instrument for finding size of object by measuring its image |
| iconophilism | a taste for pictures and symbols |
| iconoplast | one who makes images or icons |
| iconostasis | screen or partition in Eastern churches with tiers of icons |
| icterical | of, like or pertaining to or suffering from jaundice |
| icterine | yellowish or marked with yellow |
| icterine | of, like or pertaining to orioles and related birds |
| icteritious | jaundiced; yellow |
| ictus | stress in poetry or verse |
| idempotent | quantity which does not change when squared |
| ideogenous | being of mental origin |
| ideogeny | study of origins of ideas |
| ideogram | symbol that stands for a concept rather than a word |
| ideophone | word that is spoken but not written |
| ideopraxist | one who is impelled to carry out an idea |
| idiochromatic | having unique or distinctive coloration |
| idiocrasis | intrinsic peculiarity or unique feature |
| idioglossia | private language developed between children |
| idiograph | private mark; trademark |
| idiolect | distinctive individual form of speech |
| idiologism | personal speech peculiarity |
| idiomology | study of idiom, jargon or dialect |
| idiomorphic | having a unique or distinct form |
| idiopathic | disease particular to an individual |
| idiophone | percussion instrument made of naturally resonant material |
| idiorhythmic | self-regulating |
| idiothermous | warm-blooded |
| idioticon | vocabulary of a particular district |
| idolomancy | divination using idols |
| idolomania | obsession or devotion to idols |
| idolothyte | sacrifice presented to an idol |
| idolum | mental image; logical fallacy |
| idoneous | suitable; appropriate |
| ifsoever | if ever |
| ignavia | laziness; laxity |
| ignescent | capable of emitting sparks; of a volatile mood |
| ignicolist | fire-worshipper |
| ignify | to burn |
| ignipotent | presiding over fire |
| ignivomous | vomiting or spewing forth fire |
| ignoscency | forgiveness |
| ignotism | mistake due to ignorance |
| ilastical | propitiatory; expiatory |
| iliac | of, like or pertaining to the loins |
| ilicic | of, like or pertaining to holly |
| ilke | kind or nature |
| illapse | to glide in |
| illaqueate | to ensnare |
| illation | the act of inferring from premises |
| illative | indicating movement into or toward |
| illaudable | not praiseworthy |
| illeist | one who refers to oneself in the third person |
| illimitable | limitlessly infinite |
| illinition | act of rubbing against or on |
| illiquation | the melting of one thing into another |
| illision | the act of striking against something |
| illocution | an act which is performed by speaking words |
| illude | to trick |
| illuminism | belief in an inward spiritual light |
| illusionism | belief that the external world is philosophy |
| illutation | mud bath |
| illuvium | material dissolved in water and deposited in layers |
| imagism | doctrine of use of precise images with unrestricted subject |
| imago | idealized mental image of a person |
| imbibition | the absorption of a liquid by a solid or gel |
| imbreviate | to enroll |
| imbricate | to lay overlapping one another |
| imbroglio | confusing or disturbing situation; confused mass or heap |
| imbrue | to wet or moisten |
| imbrute | to degrade to the state of a brute |
| imburse | to put in a purse; to pay |
| immanation | flowing in |
| immanent | inherent; permanently pervading the universe |
| immanentism | belief in an immanent or permanent god |
| immarcescible | unfading; imperishable |
| immaterialism | the doctrine that there is no material substance |
| immeability | state of being impassable or impermeable |
| immerge | to immerse; to dip into water |
| immeritous | undeserving |
| imminution | lessening; decreasing |
| immiseration | progressive impoverishment or degradation |
| immission | insertion; infusion |
| immix | to commingle |
| immoralism | rejection of morality |
| immortelle | everlasting dried flower |
| immunifacient | causing immunity |
| immunogenetics | study of genetic characteristics of immunity |
| immunogenic | producing an immune response |
| immunopathology | study of immunity to disease |
| immure | to imprison; to shut in |
| impacable | not able to be quieted or appeased |
| impanate | embodied in bread |
| imparidigitate | having an odd number of fingers on each limb |
| imparlance | delay in pleading for amicable adjustment |
| impaste | to lay paint or colours thickly on |
| impavid | fearless; undaunted |
| impecunious | without money; penniless |
| impedimenta | things that impede; baggage |
| impedimentary | hindering; obstructing |
| impennate | featherless; wingless |
| imperscriptible | not recorded; unwritten |
| imperseverant | lacking the power to perceive |
| impest | to infest with plague or pestilence |
| impetrate | to obtain by entreaty, request or prayer |
| impignorate | to pledge, pawn or mortgage |
| impleach | to intertwine |
| impletion | filling; fullness; fulfilment |
| implex | not simple; involved; complicated |
| implodent | an implosive sound |
| implumous | without feathers |
| imponent | that which imposes an obligation |
| importune | to press or urge with repeated requests |
| impostume | abscess |
| imprecate | to call down by prayer; to curse; to invoke evil on |
| imprescriptible | inalienable |
| imprest | a loan or advance of money |
| imprimatur | licence to print a book |
| imprimis | in the first place |
| imprimitive | not primitive |
| impropriate | to appropriate for private use |
| improvident | lacking foresight; thoughtless |
| impudicity | shamelessness |
| impugn | to oppose; to attack by words or arguments |
| imputation | attribution of fault to |
| imsonic | onomatopoetic |
| inaniloquent | prone to foolish or empty babbling |
| inanition | emptiness; starvation |
| inappetent | lacking desire or appetite |
| inapt | unfit or unqualified |
| inaurate | gilded; golden |
| inbeing | inherence; inherent existence |
| inboard | inside the line of a ship's bulwarks or hull |
| incalescent | growing warm |
| incanous | covered with soft white hair |
| incardination | acceptance by a diocese of clergyman from another diocese |
| incarnadine | carnation-coloured; blood-red |
| incatenation | harnessing; chaining together |
| incede | to advance majestically |
| incendivity | the power of causing ignition |
| incentivize | to be given an incentive |
| incept | to take into the body; ingest |
| inceptive | marking the beginning or formation |
| inchoate | undeveloped; just begun |
| incipient | beginning; in an early stage |
| incivism | neglect of duty as a citizen |
| inclinometer | instrument for measuring inclination to the horizontal of an axis |
| incommiscible | unable to be mixed or intermingled |
| incommode | to cause trouble or inconvenience to |
| incommutable | that cannot be commuted or exchanged |
| incompossible | incapable of coexisting |
| inconcinnity | lack of congruousness or proportion |
| incondite | not well put together; poorly constructed |
| inconscient | unconscious; abstracted |
| incoronate | crowned |
| incorpse | to incorporate |
| incrassate | to thicken |
| increscent | waxing |
| incubus | nightmare; burden |
| inculcate | implant in by persistent urging |
| inculpate | to blame; to incriminate |
| incult | uncultivated; coarse |
| incunabulist | one who collects early books |
| incunabulum | early printed book; early version of a thing |
| incuse | impressed or stamped upon |
| indagate | to search out; to investigate |
| indehiscent | not opening when mature |
| indicia | indicating marks or symptoms |
| indifferentism | the belief that all religions are equally valid |
| indigence | poverty; state of being needy |
| indign | unworthy; disgraceful; unseemly |
| indigo | deep blue-violet colour; a blue-violet dye |
| indiscerptible | not able to be separated |
| indite | to compose |
| individualism | belief that individual interests and rights are paramount |
| indoles | inherent disposition |
| induciae | peace treaty or armistice |
| indue | to supply; to endow |
| indulgence | former Catholic pardon granted for remission of punishment for sins |
| indult | special temporary dispensation granted by the Catholic church |
| indumentum | total body covering of hair, fur or feathers |
| indurate | to make hard, callous or unfeeling |
| induviae | withered leaves which persist on plants |
| indwell | to exist within as a guiding force |
| ineluctable | against which it is useless to struggle |
| inescatory | of, like or pertaining to baiting; adapted to bait |
| inesculent | inedible |
| inessive | indicating location within |
| ineunt | entering |
| inexpiable | that which cannot be expiated or atoned for |
| inexpugnable | not able to be attacked or captured |
| infandous | unmentionable |
| infantocracy | government by an infant |
| infarction | tissue dying due to lack of blood flow |
| infaust | unlucky; ill-omened |
| infelicitous | inappropriate in application or expression |
| inferiae | offerings to the spirits of the dead |
| inficete | not facetious; rudely jesting |
| inflorescence | process of producing flowers; flowering |
| infomania | excessive devotion to accumulating facts |
| infra | below; later in a text |
| infrangible | not able to be broken or violated |
| infructuous | not fruitful |
| infumate | smoky; blackened |
| infundibuliform | having the form or shape of a funnel or cone |
| infuscate | clouded or tinged with brown; obscured; cloudy brown colour |
| ingannation | deception |
| ingate | inlet for molten metal in founding |
| ingeminate | to reiterate; to redouble |
| ingerence | intrusion; interference |
| ingle | a fire in a room; a fireplace |
| inglenook | alcove by a large open fire |
| ingluvies | a crop or craw of birds |
| ingravescent | becoming more severe |
| ingression | pronounced with inhalation rather than exhalation |
| inguinal | of, like or pertaining to the groin |
| ingurgitate | to swallow; to guzzle |
| inhaust | to drink in |
| inhere | be inherent |
| inhumation | burial; act of depositing in the ground |
| inhumist | referring to a society that burns its dead |
| inimical | hostile; harmful |
| iniquity | wickedness; gross injustice |
| inkhorn | portable case for ink |
| inkhornism | pedantic word or expression |
| inlagation | pardoning of an outlaw |
| inlapidate | to petrify |
| inly | inwardly; thoroughly |
| innitency | state of leaning or resting upon something |
| innominate | having no name |
| innoxious | harmless |
| inoperculate | without an operculum or lid |
| inopinate | not thought of; unexpected |
| inosculate | to join together with ducts or openings; to blend or combine |
| inquiline | living with another; dwelling in another creature's lair |
| inquinate | to corrupt or defile |
| inquirendo | authority to inquire into something |
| inquisiturient | eager to act as an inquisitor |
| inquorate | not making up a quorum |
| inscenation | staging; setting |
| inscient | having little or no knowledge |
| insculp | to engrave, to cut or carve from something |
| insectifuge | insect repellent |
| insectivorous | eating insects |
| insectology | study of insects |
| insessorial | adapted for perching |
| insidiate | to conspire against; to betray |
| insipience | lack of wisdom; stupidity |
| insolate | to treat by exposure to the sun's rays |
| insouciance | indifference; apathy |
| insouciant | lighthearted and unconcerned |
| inspan | to bring or force into service |
| inspissate | to thicken or condense |
| instauration | restoration; renewal |
| institorial | of, like or pertaining to an agent or factor |
| instructive | indicating means whereby |
| instrumental | indicating means by which |
| instrumentalism | doctrine that ideas are instruments of action |
| insufflate | to disseminate by blowing; to breathe upon |
| insulse | lacking wit; dull; stupid; insipid |
| intaglio | a figure engraved into a gem or another substance |
| integument | an external covering or coating |
| intellection | act of thinking; exercise of the intellect |
| intellectualism | belief that all knowledge is derived from reason |
| intemerate | pure; undefiled |
| intempestive | unseasonable; untimely; inopportune |
| intenerate | to make tender; to soften |
| intenible | not capable of holding or retaining |
| interactionism | belief that mind and body act on each other |
| interamnian | between two rivers |
| intercalary | interpolated; inserted between other things |
| intercalation | interpolation; insertion between others |
| interciliary | between the eyebrows |
| intercipient | intercepting |
| interclude | to block; to enclose; to cut off |
| intercolline | lying between hills |
| intercostal | between the ribs |
| intercrural | within or pertaining to the area between the legs |
| interdigitate | to interlock in the manner of locked fingers |
| interdine | to eat together |
| interfenestration | spacing of windows |
| interferometer | instrument for analysing spectra of light |
| interfluve | area between two rivers that flow in the same direction |
| intergrade | to merge or shade by means of intermediate steps |
| interim | meanwhile |
| interjacent | intervening; situated between two things |
| interjaculate | to ejaculate in interruption |
| interlaminate | to insert between layers |
| interlocutor | one who converses; interpreter; participant in conversation |
| interlucation | thinning of a forest to let some light in |
| interlunation | dark time between old moon and new |
| intermure | to wall in |
| internecine | causing (mutual) destruction |
| internuncio | messenger between two parties; low-ranking papal legate |
| interosculant | possessing attributes common to different groups |
| interpellation | question raised during the course of debate |
| interpilaster | space between two pilasters |
| interpunction | insertion of punctuation marks in writing |
| interramification | interweaving of branches |
| interrex | one who rules during an interregnum; regent |
| interscribe | to write between |
| intersidereal | between stars |
| interstitial | of, like or pertaining to the space between things |
| intertesselation | complex interrelationship |
| intertie | short timber binding together upright posts |
| intertrigo | skin rash due to friction of two moist surfaces |
| intervallum | between the ramparts |
| intervolve | to roll up or entwine with one another |
| intinction | administering communion by dipping bread into wine |
| intitule | to endow or furnish with a title |
| intorted | twisted inwards; involved |
| intrados | undersurface of an arch or vault |
| intrant | entering; penetrating |
| introessive | indicating motion into |
| introit | psalm or hymn sung at beginning of church service |
| intromit | to introduce; to admit; to insert |
| introrse | turned or facing inward |
| introspectionism | doctrine that knowledge of mind must derive from introspection |
| intuitionism | belief that the perception of truth is by intuition |
| intumesce | to enlarge; to swell; to bubble |
| intussusception | movement of one part of a thing into another |
| inumbrate | to cast a shadow upon; to shade |
| inunction | anointing, smearing or rubbing with ointment |
| inurbanity | lack of manners or deportment; incivility |
| inusitation | disuse; disrepair |
| inustion | burning in; cauterization |
| invaginate | to sheathe; to draw in; to enfold |
| inveigh | to make an attack in speech or writing |
| inveigle | to entice; to wheedle |
| invenit | invented it |
| inverecund | shameless; unabashed |
| inveterate | long-established; confirmed |
| invictive | insurmountable; undefeatable |
| invidious | likely to excite indignation against the performer |
| invination | presence of Christ's blood in sanctified wine |
| inviscate | to entrap with sticky material |
| invitatory | psalm or anthem sung before prayer during church service |
| invultuation | the making of an image for use in witchcraft |
| ipseity | selfhood; state of being oneself |
| iracund | inclined to become angry |
| iracundulous | somewhat inclined to become angry |
| irascent | becoming enraged or angry |
| irenic | conducive to or working towards peace |
| irenology | the study of peace |
| iridian | having or suggestive of the colours of a rainbow |
| iridic | of, like or pertaining to the iris of the eye |
| iridize | to make iridescent |
| iridology | study of iris |
| iriscope | instrument for exhibiting the prismatic colours |
| irradicate | to fix firmly |
| irrecusable | that cannot be rejected |
| irredentism | advocating restoration of territory to a nation |
| irrefragable | that cannot be refuted; unanswerable |
| irrefrangible | incapable of refraction |
| irremeable | which cannot be returned; irrevocable |
| irriguous | watered; wet; irrigating |
| irrision | the act of laughing at another |
| irrisory | mocking; derisive |
| irroration | watering a plant with discharge of a sick person |
| irruption | breaking or bursting in |
| isabelline | greyish yellow |
| isabnormal | line connecting points of equal deviation from mean temperature |
| isacoustic | line connecting points of equal acoustic quality |
| isagoge | academic introduction to a subject |
| isagogic | introductory |
| isallobar | line connecting points of equal change in barometric pressure |
| isanemone | line connecting points on map having same wind velocity |
| isapostolic | equal to or contemporary with the apostles |
| isatis | Arctic fox |
| ischaemia | lack of blood in a part of the body due to an obstruction |
| ischiatic | of or pertaining to the ischium or hip |
| ischiorrhogic | of an iambic line, having spondees in the second, fourth or sixth place |
| ischuretic | diuretic |
| ischuria | retention of urine |
| iseidomal | line connecting points of equal visibility of a spectacle |
| isentropic | line connecting points of equal entropy |
| ishan | prehistoric Iraqi mound |
| ishies | hip-joints |
| ising | meat sausage |
| isinglass | firm semitransparent substance used to make jellies |
| islandic | of or pertaining to an island |
| islesman | inhabitant of a group of islands |
| islomania | craze or obsession for islands |
| ismatic | addicted to "isms" or faddish theories |
| isness | the fact of being; essence |
| isobar | line connecting points of same atmospheric pressure |
| isobase | line connecting points of equal land upheaval |
| isobath | line connecting points of equal underwater depth |