|
 Hackneyed | overused, trite |
| Haphazard | not planned, random |
| Harangue | long speech |
| Harass | to torment |
| Harbinger | forerunner |
| Haughty | extremely proud |
| Hauteur | disdainful pride |
| Havoc | great destruction |
| Hawser | strong rope |
| Heady | impetuous |
| Hearth | fireplace floor |
| Hegemony | dominance of authority |
| Heinous | hateful, evil |
| Heptagon | seven-sided polygon |
| Heresy | anti-religious thought |
| Hermetic | airtight |
| Heterodox | differing from the accepted standard |
| Heterogeneous | differing in structure, mixed |
| Hexapod | something with six legs |
| Hiatus | gap |
| Hibernal | pertaining to winter |
| Hierarchy | an ordering by rank of grade |
| Hinder | to thwart, impede |
| Histrionic | theatrical |
| Hoax | practical joke, trick |
| Holocaust | complete destruction |
| Homily | sermon |
| Homogeneous | uniform in structure |
| Homologous | corresponding in structure |
| Horology | science of measuring time |
| Hortative | exhorting, pleading |
| Horticulture | the art of growing flowers, plants, fruits |
| Huddle | to crowd together |
| Humus | fertilizer, organic part of soil |
| Hurtle | to speed |
| Husbandry | cultivation and care of plants and animals |
| Hybrid | of mixed origin |
| Hydrophobia | fear of water |
| Hyperbole | exaggeration |
| Hypothesis | assumption |
| Idiosyncrasy | peculiar mannerism |
| Idyllic | pleasing, simple, pastoral |
| Ignoble | mean, base |
| Ignominious | shameful, degrading |
| Illicit | unlawful |
| Illimitable | boundless |
| Illusory | deceptive |
| Imbibe | to absorb or drink |
| Imbroglio | confused situation |
| Imbue | to permeate |
| Immolate | to offer in sacrifice |
| Immutable | unchangeable |
| Impale | to pierce through |
| Impalpable | not understood, vague |
| Impasse | deadlock |
| Impassioned | ardent, fervent |
| Impeach | to accuse |
| Impeccable | flawless |
| Impecunious | having no money, poor |
| Imperceptible | slight, subtle |
| Imperious | domineering |
| Impertinent | rude |
| Impervious | not influenced |
| Impetuous | impulsive |
| Impious | lacking reverence |
| Implicit | implied, not appearent |
| Imply | to indicate by indirect statement |
| Importune | to urge persistently |
| Impromptu | insolence |
| Impugn | to challenge as false |
| Impunity | freedom harm |
| Impute | to attribute (something bad) to another |
| Inadvertence | negligence, oversight |
| Inalienable | unable to be taken away |
| Inane | lacking sense |
| Inarticulate | unable to speak clearly |
| Incendiary | one who excites or agitates |
| Inception | beginning |
| Incessant | never ceasing |
| Inchoative | just begun, initial |
| Incipient | beginning to appear |
| Inclement | stormy |
| Inclusive | taking all factors into account |
| Incognito | disguised |
| Incongruous | unconforming, inconsistent |
| Inconsiderable | trivial, small |
| Inconspicuous | not readily apparent |
| Incorrigible | not able to be corrected, delinquent |
| Incredulous | not readily apparent |
| Incorrigible | not able to be corrected, delinquent |
| Incredulous | skeptical |
| Increment | increase, addition |
| Inculpate | to incriminate |
| Incumbent | officeholder, obligatory |
| Indefatigable | tireless |
| Indigenous | native to |
| Indigent | poor |
| Indolent | lazy |
| Indurate | hardened |
| Ineffable | unspeakable, indescribable |
| Inert | without power to move or resist |
| Inexorable | unrelenting |
| Infamy | unrelenting |
| Infamy | bad reputation |
| Inference | conclusion |
| Infernal | hellish, fiendish |
| Infinitesimal | immeasurable small |
| Infrastructure | basic framework of an organization |
| Infringe | to encroach upon |
| Ingenious | resourceful, inventive |
| Ingenuous | frank, naïve |
| Ingratiate | to seek someone's favor |
| Inherent | belonging by nature |
| Inimical | hostile |
| Iniquitous | unjust |
| Injunction | court order, command |
| Innate | natural, existing from birth |
| Innocuous | harmless |
| Innuendo | hint, allusion |
| Inscrutable | enigmatic, mysterious |
| Insidious | treacherous |
| Insinuate | to suggest, hint at artfully |
| Insipid | dull, tasteless |
| Insolvent | bankrupt |
| Instigator | one who incites action |
| Insular | narrow-minded, limited |
| Insurgent | one who revolts against established authority |
| Intangible | incorporeal, vague |
| Intemperance | excessive indulgence |
| Interdict | to prohibit |
| Interment | burial |
| Interminable | endless |
| Internment | confinement (of enemies) |
| Interpolate | to change by inserting new material |
| Interstice | space, interval |
| Intractable | unruly, stubborn |
| Intransigent | refusing to compromise |
| Intrepid | fearless |
| Intrinsic | inherent |
| Introvert | to turn inward |
| Intuition | insight |
| Inundate | to overflow overwhelm |
| Inure | habituate |
| Invective | denunciation |
| Inveigh | to complain bitterly |
| Inveigle | to trick, entice |
| Investiture | installation in office |
| Inveterate | firmly established |
| Invidious | offensive |
| Invincible | unconquerable |
| Inviolate | sacred |
| Irascible | contrary to what was expected, sarcastic |
| Isthmus | narrow strip of land |
| Iterate | to repeat over and over |
| Itinerant | traveling from place to place |