IELTS Vocabulary I (Part 3)
indigestible adj. Not digestible, or difficult to digest.
indigestion n. Difficulty or failure in the alimentary canal in changing food into absorptive nutriment.
indignant adj. Having such anger and scorn as is aroused by meanness or wickedness.
indignity n. Unmerited contemptuous conduct or treatment.
indiscernible adj. Not perceptible.
indiscreet adj. Lacking wise judgment.
indiscriminate adj. Promiscuous.
indispensable adj. Necessary or requisite for the purpose.
indistinct adj. Vague.
indivertible adj. That can not be turned aside.
indivisible adj. Not separable into parts.
indolence n. Laziness.
indolent adj. Habitually inactive or idle.
indomitable adj. Unconquerable.
induct v. To bring in.
indulgence n. The yielding to inclination, passion, desire, or propensity in oneself or another.
indulgent adj. Yielding to the desires or humor of oneself or those under one's care.
inebriate v. To intoxicate.
inedible adj. Not good for food.
ineffable adj. Unutterable.
inefficient adj. Not accomplishing an intended purpose.
inefficiency n. That which does not accomplish an intended purpose.
ineligible adj. Not suitable to be selected or chosen.
inept adj. Not fit or suitable.
inert adj. Inanimate.
inestimable adj. Above price.
inevitable adj. Unavoidable.
inexcusable adj. Not to be justified.
inexhaustible adj. So large or furnishing so great a supply as not to be emptied, wasted, or spent.
inexorable adj. Unrelenting.
inexpedient adj. Unadvisable.
inexpensive adj. Low-priced.
inexperience n. Lack of or deficiency in experience.
inexplicable adj. Such as can not be made plain.
inexpressible adj. Unutterable.
inextensible adj. Of unchangeable length or area.
infallible adj. Exempt from error of judgment, as in opinion or statement.
infamous adj. Publicly branded or notorious, as for vice, or crime.
infamy n. Total loss or destitution of honor or reputation.
inference n. The derivation of a judgment from any given material of knowledge on the ground of law.
infernal adj. Akin to or befitting hell or its occupants.
infest v. To be present in such numbers as to be a source of annoyance, trouble, or danger.
infidel n. One who denies the existence of God.
infidelity n. Disloyalty.
infinite adj. Measureless.
infinity n. Boundless or immeasurable extension or duration.
infirm adj. Lacking in bodily or mental strength.
infirmary n. A place for the reception or treatment of the sick.
infirmity n. A physical, mental, or moral weakness or flaw.
inflammable adj. Easily set on fire or excited.
inflammation n. A morbid process in some part of the body characterized by heat, swelling, and pain.
inflexible adj. That can not be altered or varied.
influence n. Ability to sway the will of another.
influential adj. Having the power to sway the will of another.
influx n. Infusion.
infrequence n. Rareness.
infrequent adj. Uncommon.
infringe v. To trespass upon.
infuse v. To instill, introduce, or inculcate, as principles or qualities.
infusion n. The act of imbuing, or pouring in.
ingenious adj. Evincing skill, originality, or cleverness, as in contrivance or arrangement.
ingenuity n. Cleverness in contriving, combining, or originating.
ingenuous adj. Candid, frank, or open in character or quality.
inglorious adj. Shameful.
ingraft v. To set or implant deeply and firmly.
ingratiate v. To win confidence or good graces for oneself.
ingratitude n. Insensibility to kindness.
ingredient n. Component.
inherence n. The state of being permanently existing in something.
inherent adj. Intrinsic.
inhibit v. To hold back or in.
inhospitable adj. Not disposed to entertain strangers gratuitously.
inhuman adj. Savage.
inhume v. To place in the earth, as a dead body.
inimical adj. Adverse.
iniquity n. Gross wrong or injustice.
initiate v. To perform the first act or rite.
inject v. To introduce, as a fluid, by injection.
injunction n. Mandate.
inkling n. A hint.
inland adj. Remote from the sea.
inlet n. A small body of water leading into a larger.
inmost adj. Deepest within.
innocuous adj. Harmless.
innovate v. To introduce or strive to introduce new things.
innuendo n. Insinuation.
innumerable adj. Countless.