Definitions

unhealthy

[uhn-hel-thee] / ʌnˈhɛl θi /

ADJECTIVE

sick

Synonyms

STRONGEST

delicate unsound

WEAK

ailing below par debilitated diseased down dragging feeble frail ill in a decline in ill health in poor health infirm invalid laid low out of action out of shape peaked poorly run down shaky sickly unwell weak

Antonyms

STRONGEST

strong

WEAK

good healthy well

ADJECTIVE

very bad in effect on well-being

Synonyms

STRONGEST

corrupt corrupting dangerous degrading detrimental harmful hazardous negative noxious perilous perverse poisonous risky undesirable unsanitary unsound

WEAK

baneful chancy degenerate deleterious demoralizing insalubrious jeopardous morbid nefarious noisome rotten treacherous unhealthful unwholesome villainous virulent wicked

Antonyms

STRONGEST

certain good guarded helpful pure safe secure sound wholesome

WEAK

healthy strong well

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

By late October, Alary realized he needed to sever his unhealthy tie to ChatGPT and AImee.

From The Wall Street Journal • May 23, 2026

These unhealthy treats have contributed to modifying a diet usually made up of fruit, vegetables and seeds.

From Barron's • May 22, 2026

These changes persisted even after the unhealthy diet ended and body weight returned to normal.

From Science Daily • May 21, 2026

There were concerns the relationship was potentially unhealthy.

From BBC • May 18, 2026

The morning light coming through the window was gray and watery, giving her skin an unhealthy pallor.

From "Ash" by Malinda Lo