GRE words Sam needs to work on
                            Popularity (by total correct streak): 355
                            Popularity (by number of users): 1
                        
| ichthyology | the study of fish | |
| icily | frigidity | |
| iconoclast | an image-breaker | |
| illegible | undecipherable | |
| illiberal | stingy | |
| illusory | deceiving by false appearance | |
| imbibe | to drink or take in | |
| imbroglio | a misunderstanding attended by ill feeling, perplexity, or strife | |
| imbrue | to wet or moisten | |
| immiscible | separating, as oil and water | |
| impassible | not moved or affected by feeling (not to be confused with impassable--not able to be passed) | |
| impassive | unmoved by/not exhibiting feeling | |
| impecunious | having no money | |
| impend | to be imminent (ex: "danger impends"); usually appears as the participle "impending" | |
| imperious | insisting on obedience | |
| impertinence | rudeness | |
| impervious | impenetrable, incapable of being penetrated, injured or influenced | (revised) | 
| impetuous | impulsive | |
| impolitic | inexpedient | |
| impregnable | that can not be taken by assault | |
| improvident | lacking foresight or thrift | |
| impudence | insolent disrespect | |
| impunity | freedom from punishment | |
| inane | silly | |
| inborn | implanted by nature | |
| incandescence | white or glowing with heat | |
| incendiary | chemical or person who starts a fire literally or figuratively | |
| inchoate | incipient, initial (inchoative: that which begins) | |
| incipient | beginning, initial, inchoate | |
| incongruous | unsuitable for the time, place, or occasion | |
| incontrovertible | indisputable | |
| indelible | that cannot be effaced, destroyed, or erased | |
| indigence | poverty (indigent: poor) | |
| indiscreet | lacking wise judgment | |
| indolence | laziness | |
| indolent | habitually inactive or idle | |
| indomitable | unconquerable | |
| ineffable | unutterable | |
| inexorable | unyielding, inalterable | (revised) | 
| infirmary | a place for the sick | |
| inflammable | easily set on fire or excited | |
| ingenuous | genuine, sincere, not holding back; naive | (revised) | 
| inglorious | shameful | |
| ingratiate | to win confidence or good graces for oneself | |
| inhume | to place in the earth, burry | |
| inimical | adverse | |
| injunction | mandate | |
| innocuous | harmless | |
| insentient | lacking power of feeling or perceiving | |
| insidious | working ill by slow and stealthy means | |
| insipid | tasteless | |
| insolence | pride, exhibited in contemptuous and overbearing treatment of others | |
| insolent | impudent | |
| insular | pertaining to an island | |
| insuperable | invincible | |
| interdict | authoritative act of prohibition | |
| interlocutor | one who takes part in a conversation or oral discussion | |
| interminable | having no limit or end | |
| intermit | to cause to cease temporarily | |
| intervale | a low tract of land between hills, especially along a river | |
| intestacy | the condition resulting from one's dying not having left a will (intestate: not having made a valid will) | |
| intramural | situated inside the walls of a city | |
| intrepid | fearless and bold | |
| inure | to harden or toughen by use, exercise or exposure | |
| invective | an utterance intended to case censure or reproach | |
| inveterate | habitual | |
| invidious | showing or feeling envy | |
| inviolable | incapable of being injured or disturbed | |
| involution | complication | |
| irascible | prone to anger | |
| ire | wrath | |
| iridescence | a many-colored appearance | |
| irradiance | luster | |
| irradiate | to render clear and intelligible | |
| irrefragable | cannot be refuted or disproved | |
| irrefrangible | cannot be broken or violated | |
| isochronous | denoting equal intervals of time | 
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