ill

1 affected with nausea she grew ill from the constant rocking motion of the boat Synonyms nauseous, nauseated, qualmish, queasy (also queazy), queer, queerish, sick, sickish, squeamishRelated Words green, peaked, peaky, sickly; unsettled, upset, woozyNear Antonyms settled; healthy, well

2 causing or capable of causing harm one of the ill effects of winter weather is the rapid spread of germs as people spend more time together indoors Synonyms adverse, bad, baleful, baneful, damaging, dangerous, deleterious, detrimental, evil, hurtful, harmful, injurious, mischievous, nocuous, noxious, pernicious, prejudicial, wickedRelated Words hostile, inimical, unfriendly; contagious, deadly, infectious, infective, pestiferous, pestilent, pestilential, poisonous, venomous; insidious, menacing, ominous, sinister, threatening; hazardous, imperiling (or imperilling), jeopardizing, parlous, perilous, risky, unsafe, unsound; nasty, noisome, unhealthful, unhealthy, unwholesome; destructive, fatal, killer, lethal, malignant, ruinousNear Antonyms advantageous, beneficial, useful; favorable, good, propitious; curative, healthful, healthy, helpful, palliative, remedial, salubrious, salutary, wholesome; secure, sound; benignant; noncorrosive, nondestructive, nonfatal, noninfectious, nonlethal, nonpoisonous, nonpolluting, nontoxic, nonvenomousAntonyms anodyne, benign, harmless, hurtless, innocent, innocuous, inoffensive, safe

3 temporarily suffering from a disorder of the body since I'm ill, I guess that I'll just have to miss that dental appointment Synonyms ailing, bad, down, sick, indisposed, peaked, peaky, poorly, punk, run-down, sickened, unhealthy, unsound, unwellRelated Words symptomatic; cruddy, lousy, seedy, sickish; nauseated, nauseous, qualmish, queasy (also queazy), squeamish; airsick, carsick, seasick; dizzy, light-headed, shaky, woozy; achy, feverish; diseased, disordered; decrepit, feeble, fragile, frail, infirm, invalid, sickly, weak, weakly; afflicted, troubled; challenged, debilitated, disabled, halt, incapacitated, lame; hypochondriac, hypochondriacalNear Antonyms able-bodied, conditioned, fit, well-conditioned; cured; better, convalescing, improved, mending, recovering, recuperating, rehabilitated; hardy, hearty, lusty, robust, rugged, stalwart, strong, tough; blooming, bouncing, chipper, flourishing, flush, thrivingAntonyms hale, healthful, healthy, sound, well, whole, wholesome

4 falling short of a standard such ill behavior will not be tolerated Synonyms bastard, bush, bush-league, crummy (also crumby), deficient, dissatisfactory, bad, inferior, lame, lousy, off, paltry, poor, punk, sour, suboptimal, subpar, substandard, unacceptable, unsatisfactory, wack [slang], wanting, wretched, wrongRelated Words abysmal, atrocious, awful, bitchin' [slang], brutal, damnable, deplorable, detestable, disastrous, dreadful, execrable, gnarly [slang], horrendous, horrible, pathetic, stinky, sucky [slang], terrible, unspeakable; defective, faulty, flawed; egregious, flagrant, gross; bum, cheesy, coarse, common, crappy [slang], cut-rate, junky, lesser, low-grade, low-rent, mediocre, miserable, reprehensible, rotten, rubbishy, second-rate, shoddy, sleazy, trashy; abominable, odious, vile; useless, valueless, worthless; inadequate, insufficient, lacking, meager (or meagre), mean, miserly, niggardly, scanty, shabby, short, skimp, skimpy, spare, stingy; miscreant, scurrilous, villainous; counterfeit, fake, phony (also phoney), shamNear Antonyms classic, classical; A1, bang-up, banner, boss [slang], capital, choice, crackerjack, dandy, divine, excellent, exceptional, fabulous, fine, first-class, first-rate, grand, great, groovy, heavenly, high-test, jim-dandy, keen, marvelous (or marvellous), mean, neat, nifty, noble, par excellence, perfect, premium, prime, sensational, slick, splendid, stellar, sterling, superb, superior, superlative, supernal, swell, terrific, tip-top, top, top-notch, unsurpassed, wonderful; better, exceptional, fancy, high-grade, special, sufficient; average, borderline, fair, mediocre, middling, minimal, so-so, unexceptional; suitable, useful, worthy; gratifying, satisfyingAntonyms acceptable, adequate, all right, decent, fine, OK (or okay), passable, respectable, satisfactory, standard, tolerable

5 being or showing a sign of evil or calamity to come the abrupt breakdown of negotiations appears to be an ill omen for this ongoing hostage situation Synonyms baleful, dire, direful, doomy, foreboding, ominous, ill-boding, inauspicious, menacing, minatory, portentous, sinister, threateningRelated Words black, bleak, cheerless, chill, Cimmerian, cloudy, cold, comfortless, dark, darkening, depressing, depressive, desolate, dim, disconsolate, dismal, drear, dreary, dreich [chiefly Scottish], elegiac (also elegiacal), forlorn, funereal, gloomy, glum, godforsaken, gray (also grey), lonely, lonesome, lugubrious, miserable, morbid, morose, murky, plutonian, saturnine, sepulchral, somber (or sombre), sullen, sunless, tenebrific, tenebrous, wretched; discouraging, disheartening, hopeless, unfavorable, unpromising, unpropitious; ill-fated, ill-starred, star-crossed, troubled, unfortunate, unlucky; evil, malign, malignantNear Antonyms auspicious, benign, bright, encouraging, favorable, golden, heartening, hopeful, promising, propitious, prosperousAntonyms unthreatening