| Word |
Definition |
| 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 | to arouse to action; to goad; to motivate; to induce to exist |
| Inclement | stormy; unkind |
| Incline | slope; slant |
| Inclined | tending or leaning toward; bent |
| Inclusive | tending to include all |
| Incognito | with identity concealed; using an assumed name |
| Incoherent | unintelligible; muddled; illogical |
| Incommodious | not spacious; inconvenient |
| Incompatible | inharmonious |
| Incongruity | lack of harmony; absurdity |
| Inconsequential | insignificant; unimportant |
| Inconsistency | state of being self |
| Incontinent | lacking self |
| Incontrovertible | indisputable; not open to question |
| Incorporate | to introduce something into a larger whole; to combine; to unite |
| Incorporeal | lacking a material body; insubstantial |
| Incorrigible | uncorrectable |
| Incredulity | tendency to disbelief |
| Incredulous | withholding belief; skeptical |
| Increment | increase |
| Incriminate | to accuse; to serve as evidence against |
| Incrustation | hard coating or crust |
| Incubate | to hatch |
| Incubus | burden; mental care; nightmare |
| Inculcate | to teach |
| Incumbent | obligatory; currently holding an office |
| Incur | to bring upon oneself |
| Incursion | temporary invasion |
| Indefatigable | tireless |
| Indelible | not able to be erased |
| Indemnify | to make secure against loss; compensate for loss |
| Indentation | notch; deep recess |
| Indenture | to bind as servant or apprentice to master |
| Indeterminate | uncertain; not clearly fixed; indefinite |
| Indicative | suggestive; implying |
| Indices | signs; indications |
| Indict | to charge |
| Indifferent | unmoved or unconcerned |
| Indigenous | native |
| Indigent | poor; destitute |
| Indignation | anger at an injustice |
| Indignity | offensive or insulting treatment |
| Indiscriminate | choosing at random; confused |
| Indisputable | too certain to be disputed |
| Indissoluble | permanent |
| Indite | to write; to compose |
| Indolent | lazy |
| Indomitable | unconquerable; unyielding |
| Indubitable | unable to be doubted; unquestionable |
| Induce | to persuade |
| Inductive | pertaining to induction or proceeding from the specific to the general |
| Indulgent | humoring; yielding; lenient |
| Industrious | diligent; hard |
| Inebriated | habitually intoxicated; drunk |
| Ineffable | unutterable; cannot be expressed in speech |
| Ineffectual | not effective; weak |
| Ineluctable | irresistible; not to be escaped |
| Inept | lacking skill; unsuited; incompetent |
| Inequity | unfairness |
| Inerrancy | infallibility |
| Inert | inactive; lacking power to move |
| Inevitable | unavoidable |
| Inexorable | relentless; unyielding; implacable |
| Infallible | unerring |
| Infamous | notoriously bad |
| Infantile | childish; infant-like |
| Infer | to deduce; to conclude |
| Infernal | pertaining to hell; devilish |
| Infidel | unbeliever |
| Infiltrate | to pass into or through; penetrate (an organization) sneakily |
| Infinitesimal | very small |
| Infirmity | weakness |
| Inflated | exaggerated; pompous; enlarge (with air or gas) |
| Influx | flowing into |
| Infraction | violation (of a rule or regulation); breach |
