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Synonyms

unhealthy

American  
[uhn-hel-thee] / ʌnˈhɛl θi /

adjective

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

    Synonyms:
    sickly
  2. symptomatic of or resulting from bad health.

    an unhealthy pallor.

  3. not conducive to good health; unhealthful.

    Night air was formerly considered unhealthy.

    Synonyms:
    deleterious, unhygienic
  4. morally bad, harmful, or contaminating.

    unhealthy examples for the young.

  5. dangerous; risky.

    Asking questions in this neighborhood can be unhealthy.


unhealthy British  
/ ʌnˈhɛlθɪ /

adjective

  1. characterized by ill-health; sick; unwell

  2. characteristic of, conducive to, or resulting from ill-health

    an unhealthy complexion

    an unhealthy atmosphere

  3. morbid or unwholesome

  4. informal dangerous; risky

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of unhealthy

First recorded in 1585–95; un- 1 + healthy

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.

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

From Barron's • May 22, 2026

Where the blindness becomes astonishing is that the actual military situation isn’t the one being described to us with unhealthy delight.

From The Wall Street Journal • May 21, 2026

At the time, he used smokers as an example of who should lose access, no doubt because smoking is a widely unpopular and indisputably unhealthy behavior.

From Salon • May 18, 2026

The Obesity Health Alliance, a co-alition of 70 charities and health organisations, wants the government to act more decisively against the promotion of unhealthy food and drinks.

From BBC • May 16, 2026

The night air brought mosquitoes and unhealthy fogs, and everybody understood that newborn Maximilian must of course be kept safe from such threats.

From "The School for Whatnots" by Margaret Peterson Haddix

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