unhealthy

adjective

un·​healthy ˌən-ˈhel-thē How to pronounce unhealthy (audio)
unhealthier; unhealthiest
Synonyms of unhealthynext
1
: not conducive to health : not healthful
an unhealthy climate
unhealthy habits
unhealthy foods
2
: not in good health : sickly, diseased
unhealthy animals
3
a
: risky, unsound
an unhealthy economy
b
: of a harmful nature : bad, injurious
unhealthy eating habits
unhealthy levels of lead
c
: involving or causing feelings or thoughts that are not normal and healthy
an unhealthy relationship
has an unhealthy interest in natural disasters
unhealthily adverb
unhealthiness noun

Examples of unhealthy in a Sentence

Her skin looks blotchy and unhealthy. Tests revealed an unhealthy level of lead in the water. Eating honey can be unhealthy for babies. He was stuck in an unhealthy relationship. She has an unhealthy interest in natural disasters.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The single mom's unhealthy path had started years before. Eileen Finan, PEOPLE, 6 Jan. 2026 Binge eating or an unhealthy relationship with food could develop. Heather Jones, Verywell Health, 6 Jan. 2026 Trump doesn’t want Newsom or anyone else getting involved with this issue, which has seen some forms of AI encourage children toward unhealthy eating, other self-destructive behaviors and even suicide. Thomas Elias, Mercury News, 6 Jan. 2026 These can signal unhealthy dependence. Kurt Knutsson, FOXNews.com, 30 Dec. 2025 See All Example Sentences for unhealthy

Word History

First Known Use

1595, in the meaning defined at sense 1

Time Traveler
The first known use of unhealthy was in 1595

Browse Nearby Words

Cite this Entry

“Unhealthy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unhealthy. Accessed 8 Jan. 2026.

Kids Definition

unhealthy

adjective
un·​healthy ˌən-ˈhel-thē How to pronounce unhealthy (audio)
1
: not conducive to good health : not healthful
an unhealthy climate
2
: not in good health : sickly, diseased
3
a
: risky, unsound
an unhealthy economy
b
unhealthily adverb
unhealthiness noun

Medical Definition

unhealthy

adjective
un·​healthy -ˈhel-thē How to pronounce unhealthy (audio)
unhealthier; unhealthiest
1
: not conducive to health
an unhealthy climate
2
: not in good health : sickly
unhealthiness noun

More from Merriam-Webster on unhealthy

Last Updated: - Updated example sentences
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