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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.

Unhealthy levels of exposure to this microscopic debris can damage airways and arteries, potentially triggering heart attacks and strokes.

From Los Angeles Times • Jan. 8, 2025

Unhealthy diets also have an impact on glucose, making blood glucose and insulin higher.

From Science Daily • Jun. 5, 2024

Unhealthy guilt can be an unconscious attempt to control the uncontrollable.

From Slate • Feb. 1, 2024

Unhealthy air arrived in Central and Eastern Washington on Thursday as smoke from wildfires blanketed the region.

From Seattle Times • Aug. 17, 2023

Unhealthy it might be; it was certainly secure.

From Carry On! A Story of the Fight for Bagdad by Strang, Herbert