illicit, adj. backdoor, furtive, secret, secretive, sneaky, underhanded, underhand; unauthorized, unlicensed, unlawful, illegal. See - illegal, illimitable, adj. limitless, unlimited, boundless, unbounded, infinite; unending, endless, eternal, ceaseless; immeasurable, unfathomable, incalculable; immense, vast, enormous, stretching to the far horizons,
illiteracy, n. 1. ignorance, unenlightenment, be nightedness, nescience, lack of education, illiterateness.
2. (all of reading or writing) inaccuracy, incorrectness, solecism, malapropism, error, mistake; nonstandard or substandard usage,
illiterate, adj. unlettered, unalphabetic, unlearned, unschooled, uninstructed, untaught, uneducated; unenlightened, benighted, nescient, in the dark; ignorant, unversed, uninformed, unscholarly.
ill-mannered, adj. ill-bred, bad-mannered, unmannerly, rude, impolite, uncivil. See - ill-bred, ill-natured, adj. 1. unkindly, unamiable, unfriendly, unaccommodating; quarrelsome, contentious, fractious, captious; hostile, antagonistic, inimical, ill-willed; spiteful, malicious, malevolent, hateful.
2. ill-tempered, ill-humored, cross, irascible, choleric, splenetic; crabby, crabbed, cranky, grouchy, grumpy, cantankerous, crotchety, crusty; irritable, touchy, testy, thin-skinned, waspish, peevish, petulant; moody, sulky, sullen, dour, gloomy, sullen, morose; bitter, acrimonious, acerbic, sour, caustic, tart, churlish, surly.
illness, n. sickness, ailment, malady, disorder, complaint, indisposition; affliction, disease, infection, morbidity, Pathol, affection; invalidism, valetudinarianism; weakness, feebleness, infirmity; pain, hurt, ache, wound; disability, handicap; mental disorder, derangement, neurosis, psychosis, insanity, madness,
illogical, adj. unreasoning, unreasonable, irrational; unsound, absurd, preposterous, SI. far-out, SI. screwy, SI. wacky, SI. nutty; sophistic, casuistic, fallacious, wrong, Logic, paralogistic; fallible, untenable, unproved; contradictory, incongruous, inconsistent,
ill-omened, adj. ill-starred, ill-fated, star-crossed, doomed, unlucky. See - ill-fated (def. 1).
ill-proportioned, adj. misproportioned, misshapen, disproportionate, Inf put together all wrong, not jibing; asymmetric, unsymmetrical, askew, skewed, irregular; distorted, lopsided, wry, twisted, crooked,
ill-smelling, adj. smelly, stinky, stinking, reeking, fetid, mephitic; foul, malodorous, rank, rancid, rotten; putrid, miasmic, noisome; sickening, SI. sick-making, nauseous; musty, moldy, fusty, sour; stale, stuffy, close.
ill-sounding, adj. dissonant, discordant, absonant, unmelodious, unmelodical, inharmonious; strident, stridulous, stridulant, raucous, harsh, grating, shrill, sharp, piercing; brassy, tinny, metallic; jarring, clashing, jangling; out of tune, off-tune, off-pitch, off-key, flat, Inf. sour,
ill-starred, adj. ill-omened, ill-fated, star-crossed, doomed, unlucky. See - ill-fated (def 1).