| Term | Definition |
| gainsay | deny |
| gall | annoy; chafe |
| galleon | large sailing ship. |
| galvanize | stimulate by shock; stir up; revitalize |
| gambit | opening in chess in which a piece is sacrificed |
| gamut | entire range |
| gape | open widely |
| garbled | mixed up; jumbled; distorted |
| gargantuan | huge; enormous |
| garish | over bright in color; gaudy |
| garner | gather; store up |
| garnish | decorate |
| garrulous | loquacious; wordy; talkative |
| gauche | clumsy; coarse and uncouth |
| gaudy | flashy; showy |
| gaunt | lean and angular; barren |
| gavel | hammer like tool; mallet |
| gawk | stare foolishly; look in openmouthed awe |
| genealogy | record of descent; lineage |
| generality | vague statement |
| generic | characteristic of an entire class or species |
| geniality | cheerfulness; kindliness; sympathy |
| genteel | well-bred; elegant |
| gentility | those of gentle birth; refinement |
| germane | pertinent |
| germinal | pertaining to a germ; creative |
| germinate | cause to sprout |
| gesticulation | motion; gesture |
| ghastly | horrible |
| gibberish | nonsense; babbling |
| gibe | mock |
| gingerly | very carefully |
| girth | distance around something; circumference |
| gist | essence |
| glacial | like a glacier; extremely cold |
| glaring | highly conspicuous; harshly bright |
| glaze | cover with a thin and shiny surface |
| glib | fluent; facile; slick |
| glimmer | shine erratically; twinkle |
| gloat | express evil satisfaction; view malevolently |
| gloss over | explain away |
| glower | to stare with sullen anger; scowl |
| glutton | someone who eats too much |
| gnarled | twisted |
| gnome | dwarf; underground spirit |
| goad | urge on |
| gorge | narrow canyon; steep, rocky cleft |
| gorge (v) | stuff oneself |
| gory | bloody |
| gouge | 1) tear out 2) overcharge |
| gourmand | epicure; person who takes excessive pleasure in food and drink |
| gourmet | connoisseur of food and drink |
| graft | piece of transplanted tissue |
| grandeur | impressiveness; stateliness; majesty |
| grandiloquent | pompous; bombastic; using high-sounding language |
| grandiose | pretentious; high-flown; ridiculously exaggerated; impressive |
| granulate | form into grains |
| graphic | pertaining to the art of delineating; vividly described |
| grapple | wrestle; come to grips with |
| grate | make a harsh noise; having an unpleasant effect; shred |
| gratify | please |
| gratis | free |
| gratuitous | given freely; unwarranted; uncalled for |
| gregarious | sociable |
| grievance | cause of complaint |
| grill | question severely |
| grimace | a facial distortion to show feeling such as pain, disgust, etc. |
| grisly | ghastly |
| grotesque | fantastic; comically hideous |
| grovel | crawl or creep on ground; remain prostrate |
| grudging | unwilling; reluctant; stingy |
| gruel | thin, liquid porridge |
| grueling | exhausting |
| gruesome | grisly; horrible |
| gruff | rough-mannered |
| guffaw | boisterous laughter |
| guile | deceit; duplicity; wiliness; cunning |
| guileless | without deceit |
| guise | appearance; costume |
| gull | trick; hoodwink |
| gullible | easily deceived |
| gustatory | affecting the sense of taste |
| gusto | enjoyment; enthusiasm |
| gusty | windy |
| hackneyed | commonplace; trite |
| haggard | wasted away; gaunt |
| haggle | argue about price |
| hallowed | blessed; consecrated |
| hallucination | delusion |
| haphazard | random; by chance |
| harangue | long, passionate, and vehement speech |
| harass | annoy by repeated attacks |
| harbinger | forerunner; indication |
| hardy | sturdy; robust; able to stand inclement weather |
| harrowing | agonizing, distressing |
| haughtiness | pride; arrogance |
| hazy | slightly obscure |
| headlong | hasty; rash |
| headstrong | stubborn; willful; unyielding |
| heckler | person who verbally harasses others |
| hedonist | one who believes that pleasure is the sole aim in life |
| heedless | not noticing; disregarding |
| heinous | atrocious; hatefully bad |
| heresy | opinion contrary to popular belief; opinion contrary to accepted religion |
| hermetic | 1) sealed by fusion so as to be airtight |
| hermitage | home of a hermit |
| heterodox | unorthodox; unconventional |
| heterogeneous | dissimilar; mixed |
| hiatus | gap; pause |
| hibernal | wintry |
| hilarity | boisterous mirth |
| histrionic | theatrical |
| hoary | white with age |
| hoax | trick; practical joke |
| hodgepodge | jumble, mixture of ill-suited elements |
| holster | pistol case |
| homage | honor; tribute |
| hoodwink | deceive; delude |
| horde | crowd |
| horticultural | pertaining to cultivation of gardens |
| hovel | shack; small, wretched house |
| hover | hang about; wait nearby |
| hulking | massive; bulky; great in size |
| humdrum | dull; monotonous |
| hurtle | crash; rush; to move swiftly and with great force |
| husband | use sparingly; conserve; save |
| hybrid | mongrel (<-- crossbred); mixed breed |
| hydrophobia | fear of water; rabies |
| hyperbole | exaggeration; overstatement |
| hypercritical | excessively exacting |
| hypochondriac | person unduly worried about his health; worrier without cause about illness |
| hypocritical | pretending to be virtuous; deceiving |
| ichthyology | study of fish |
| iconoclastic | attacking cherished traditions |
| idolatry | worship of idols; excessive admiration |
| ignoble | unworthy; not noble |
| ignominy | deep disgrace; shame or dishonor |
| illicit | illegal |
| imbibe | drink in |
| immaculate | spotless; flawless; |
| impale | pierce |
| impalpable | imperceptible; intangible |
| impart | reveal or tell; grant |
| impartial | not biased; fair |
| impassable | not able to be traveled or crossed |
| impasse | predicament from which there is no escape |
| impassive | without feeling; |
| impeccable | faultless |
| impecunious | without money |
| impede | hinder; block |
| impediment | hindrance; stumbling-block |
| impel | drive or force onward |
| impending | nearing; approaching |
| impenitent | not repentant |
| imperious | domineering; haughty |
| impermeable | impervious; not permitting passage through its substance |
| impertinent | 1) having no connection with a given matter; 2) insolent; rude |
| imperturbable | calm; placid |
| impervious | impenetrable; *incapable of being damaged or distressed* |
| impetuous | violent; hasty; rash |
| impetus | moving force; incentive; stimulus |
| impiety | irreverence; lack of respect for God |
| impinge | 1) infringe; 2) touch; collide with |
| impious | irreverent |
| implacable | incapable of being pacified |
| implausible | unlikely; unbelievable |
| implicate | incriminate; show to be involved |
| implore | beg |
| imponderable | weightless |
| importunate | urging; demanding |
| importune | beg persistently |
| impostor | someone who assumes a false identity |
| impregnable | invulnerable |
| impropriety | improperness; unsuitableness |
| improvident | thriftless |
| imprudent | lacking caution; injudicious |
| impudence | impertinence; insolence |
| impugn | dispute or contradict (often in an insulting way); challenge; gainsay |
| impunity | freedom from punishment or harm |
| imputation | accusation; charge; reproach |
| inadvertently | unintentionally; by oversight; carelessly |
| inalienable | not to be taken away; nontransferable |
| inane | silly; senseless |
| incandescent | strikingly bright; shining with intense heat |
| incantation | singing or chanting of magic spells; magical formula |
| incapacitate | disable |
| incarcerate | imprison |
| incarnation | act of assuming a human body and human nature |
| incendiary | having to do with the willful destruction of property by fire; arsonist |
| incense | 1) --- sticks 2) enrage; infuriate |
| inception | start; beginning |
| inchoate | recently begun; rudimentary; elementary |
| incidence | rate of occurrence; particular occurrence |
| incidental | not essential; minor |
| incipient | beginning; in an early stage |
| incisive | cutting; sharp |
| incite | arouse to action; goad; motivate; induce to exist |
| inclement | stormy; unkind |
| incompatible | inharmonious |
| incongruous | not fitting; absurd |
| incontinent | lacking self-restraint; licentious |
| incontrovertible | indisputable; not open to question |
| incorporeal | lacking a material body; insubstantial |
| incorrigible | uncorrectable |
| incredulous | withholding belief; skeptical |
| incriminate | accuse; serve as evidence against |
| incrustation | hard coating or crust |
| inculcate | teach |
| incumbent | obligatory; currently holding an office |
| incur | bring upon oneself |
| incursion | temporary invasion |
| indefatigable | tireless |
| indelible | not able to be erased |
| indentation | notch; deep recess |
| indenture | sealed agreement, esp. binding apprentice to master |
| indices | signs; indications |
| indict | accuse (esp. by legal process); charge |
| indigenous | native |
| indigent | poor; destitute |
| indignity | offensive or insulting treatment |
| indiscriminate | choosing at random; confused |
| indisputable | too certain to be disputed |
| indissoluble | permanent |
| indoctrinate | instruct in a doctrine or ideology |
| indomitable | unconquerable; unyielding |
| indubitable | unable to be doubted; unquestionable |
| induce | persuade; bring about |
| indulgent | humoring; yielding; lenient |
| inebriated | habitually intoxicated; drunk |
| ineffable | unutterable; cannot be expressed in speech |
| inefficacious | not effective |
| inept | lacking skill; unsuited; incompetent |
| inert | inactive; lacking power to move |
| inexorable | relentless; unyielding; implacable |
| infallible | unerring |
| infamous | notoriously bad |
| infantile | childish; infant like |
| infernal | pertaining to hell; devilish |
| infidel | unbeliever |
| infiltrate | pass into or through; penetrate (an organization) sneakily |
| infinitesimal | very small |
| infirmity | weakness |
| influx | flowing into |
| infraction | violation (of a rule or regulation); breach |
| infuriate | enrage; anger |
| ingenious | clever; resourceful |
| ingenue | an artless girl |
| ingenuous | naïve and trusting; young; unsophisticated |
| ingrained | deeply established; firmly rooted |
| ingrate | ungrateful person |
| ingratiate | become popular with |
| inimical | unfriendly; hostile; harmful; detrimental |
| inimitable | matchless; not able to be imitated |
| iniquitous | wicked; immoral; unrighteous |
| injurious | harmful |
| inkling | hint |
| innocuous | harmless |
| innuendo | hint; insinuation |
| inopportune | untimely; poorly chosen |
| inordinate | unrestrained; excessive |
| inquisitor | questioner (especially harsh); investigator |
| insalubrious | unwholesome; not healthful |
| insatiable | not easily satisfied; unquenchable; greedy |
| inscrutable | impenetrable; not readily understood; mysterious |
| insidious | treacherous; stealthy; sly |
| insinuate | hint; imply; creep in |
| insipid | lacking in flavor; dull |
| insolence | impudent disrespect; haughtiness |
| insomnia | wakefulness; inability to sleep |
| instigate | urge; start; provoke |
| insubordination | disobedience; rebelliousness |
| insubstantial | lacking substance; insignificant; frail |
| insularity | narrow-mindedness; isolation |
| insuperable | insurmountable; unbeatable |
| insurgent | rebellious |
| insurmountable | overwhelming; unbeatable; insuperable |
| insurrection | rebellion; uprising |
| intangible | not able to be perceived by touch; *vague* |
| integral | complete; necessary for completeness |
| integrity | uprightness; wholeness |
| intemperate | immoderate; excessive |
| inter | bury |
| interdict | prohibit; forbid |
| interim | meantime |
| interloper | intruder |
| interment | burial |
| interminable | endless |
| intermittent | periodic; on and off |
| intractable | unruly; stubborn; unyielding |
| intransigence | refusal of any compromise; stubbornness |
| intrepid | not afraid; bold; fearless; dauntless; very brave |
| intrinsic | essential; inherent; built-in |
| introspective | looking within oneself |
| introvert | one who is introspective; inclined to think more about oneself |
| inundate | overwhelm; flood; submerge |
| inured | accustomed; hardened |
| invalidate | weaken; destroy |
| invective | abuse; verbal attack |
| inveigle | entice; tempt (into) |
| inverse | opposite |
| invert | turn upside down or inside out |
| inveterate | deep-rooted; habitual |
| invidious | designed to create ill will or envy |
| invincible | unconquerable |
| inviolable | secure from corruption, attack, or violation; unassailable |
| invocation | prayer for help; calling upon as reference or support |
| invoke | call upon; ask for |
| invulnerable | incapable of injury |
| iota | very small quantity |
| irascible | irritable; easily angered |
| irate | angry |
| ire | anger |
| iridescent | exhibiting rainbow-like colors |
| irksome | annoying; tedious |
| irreconcilable | incompatible; not able to be resolved |
| irrefutable | indisputable; |
| incontrovertible | undeniable |
| irremediable | incurable; uncorrectable |
| irreparable | not able to be corrected or repaired |
| irreproachable | blameless; impeccable |
| irresolute | uncertain how to act; weak |
| irretrievable | impossible to recover or regain |
| irreverence | lack of proper respect |
| irrevocable | unalterable; irreversible |