not in a state of good or normal health; in an unsound, weak, or morbid condition.

symptomatic of or resulting from bad health

an unhealthy pallor.

not conducive to good health; unhealthful

Night air was formerly considered unhealthy.

morally bad, harmful, or contaminating

unhealthy examples for the young.

dangerous; risky

Asking questions in this neighborhood can be unhealthy.

adjective

healthy , strong , well , good

adjective

ailing , below par , debilitated , delicate , diseased , down , dragging , feeble , frail , ill , in a decline , infirm , in ill health , in poor health , invalid , laid low , out of action , out of shape , peaked , poorly , run-down , shaky , sickly , unsound , unwell , weak , baneful , chancy , corrupt , corrupting , dangerous , degenerate , degrading , deleterious , demoralizing , detrimental , harmful , hazardous , insalubrious , jeopardous , morbid , nefarious , negative , noisome , noxious , perilous , perverse , poisonous , risky , rotten , treacherous , undesirable , unhealthful , unsanitary , unwholesome , villainous , virulent , wicked , unsalutary , contaminative , corruptive , depraved , flagitious , miscreant , macabre , sick , inimical , insalutary , insanitary , morbific , pathological , pernicious , pestiferous , pestilent , septic , unhygienic