| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | unhealthy |
| Synonyms: | afflicted, ailing, indisposed, infected, infectious, infirm, rotten, sick, sickly, tainted, unsound, unwell, unwholesome |
| Antonyms: | fit, healthy |
| Main Entry: | bad |
| Part of Speech: | adjective |
| Definition: | sick |
| Synonyms: | ailing, diseased, ill, in pain, unwell |
| Notes: | badly is an adverb to describe an activity; bad is an adjective to describe a condition or state |
| Main Entry: | ill |
| Part of Speech: | adjective |
| Definition: | sick |
| Synonyms: | a wreck, afflicted, ailing, below par, bummed, diseased, down, down with, feeling awful, feeling rotten, feeling terrible, got the bug, indisposed, infirm, laid low, off one's feet, on sick list, out of sorts, peaked, poorly, queasy, rotten, run-down, running temperature, sick as a dog, under the weather, unhealthy, unwell, woozy |
| Antonyms: | good, healthy, sound, strong, well |
| Main Entry: | infectious |
| Part of Speech: | adjective |
| Definition: | catching, spreading |
| Synonyms: | communicable, contagious, contaminating, corrupting, defiling, diseased, epidemic, infective, mephitic, miasmic, noxious, pestilent, pestilential, poisoning, polluting, toxic, transferable, transmittable, virulent, vitiating |
| Notes: | diseases spread by contact are contagious and those spread by air or water are infectious |
| Antonyms: | antiseptic, germless, harmless, non-infectious, uncommunicable, uncontagious |
| Main Entry: | morbid |
| Part of Speech: | adjective |
| Definition: | gloomy, nasty, sickly |
| Synonyms: | aberrant, abnormal, ailing, brooding, dark, deadly, depressed, despondent, diseased, dreadful, frightful, ghastly, ghoulish, grim, grisly, gruesome, hideous, horrid, infected, irascible, macabre, malignant, melancholy, monstrous, moody, pessimistic, saturnine, sick, somber, sullen, unhealthy, unnatural, unsound, unusual, unwholesome |
| Antonyms: | cheerful, happy, healthy, pleased, sound |
| Main Entry: | palsied |
| Part of Speech: | adjective |
| Definition: | crippled |
| Synonyms: | arthritic, atonic, debilitated, disabled, diseased, helpless, neurasthenic, paralytic, paralyzed, rheumatic, sclerotic, shaking, shaky, sick, spastic, trembling, tremorous, weak |
| Antonyms: | healthy, steady, walking |
| Main Entry: | pestilent/pestilential |
| Part of Speech: | adjective |
| Definition: | dangerous, |
| Synonyms: | contagious, contaminating, corrupting, deadly, deleterious, destructive, detrimental, diseased, evil, fatal, harmful baneful, infectious, injurious, lethal, mortal, noxious, pernicious, pestiferous, ruinous, tainting, troublesome, vicious |
| Antonyms: | clean, healthy, hygienic, safe, sanitary |
| Main Entry: | rotten |
| Part of Speech: | adjective |
| Definition: | despicable, inferior, bad |
| Synonyms: | amiss, base, below par, bruised, bum*, contemptible, crummy, defective, deplorable, dirty, disagreeable, disappointing, diseased, displeasing, dissatisfactory, filthy, impaired, inadequate, injured, lousy*, low-grade, mean, nasty, poor, punk*, regrettable, rough, scurrilous, shaky, sorry, sour, substandard, unacceptable, unfortunate, unhappy, unlucky, unpleasant, unsatisfactory, unsound, vile, wasted, wicked, withering, wrong |
| Antonyms: | good, kind, nice, superior |
| Main Entry: | sick |
| Part of Speech: | adjective |
| Definition: | not healthy, not feeling well |
| Synonyms: | ailing, bedridden, broken down, confined, debilitated, declining, defective, delicate, diseased, disordered, down, feeble, feverish, frail, funny*, green*, hospitalized, ill, impaired, imperfect, in a bad way, in poor health, incurable, indisposed, infected, infirm, invalid, laid-up, lousy, mean, nauseated, not so hot, peaked, poorly, qualmish, queasy, rickety, rocky, rotten, run down, sick as a dog, suffering, tottering, under medication, under the weather, unhealthy, unwell, weak, wobbly |
| Antonyms: | healthy, undiseased, well |