Synonyms of unhealthy

1 Syllable

ill, frail, weak, down, sick

2 Syllables

miscreant, harmful, sicker, laid-low, sickish, curdled, beat-up, sickly, poorly, peaked, olid, carious, ailing, noxious, dragging, run-down, parlous, rancid, sickest, laid-up, nocent, shaky, unsound, unwell, riskier, morbid, risky, feeble, unfit, infirm, scurvy

3 Syllables

injurious, invalid, unbacked, dogeared, dog-eared, untended, hysteric, perilous, feculent, putrescent, hazardous, ill-famed, neurotic, noisome, precarious, virulent, jeopardous, depraved, diseased, infamous, dangerous, perverted, unhealthful, flatitious, perverse

4 Syllables

obsessive, delicate, uneatable, down-at-the-heel, uncared-for, evil-smelling, defective, dangersome, pestiferous, pestilential, unhygienic, ill-equipped, insalubrious, unnutritious, impugnable

5 Syllables

unconducive, psychoneurotic, putrefactive, unwholesome, unsanitary, hospitalized, indigestible, degenerate, degenerated, insalutary, debilitated