harmful

adjective

harm·​ful ˈhärm-fəl How to pronounce harmful (audio)
: of a kind likely to be damaging : injurious
harmfully adverb
harmfulness noun

Examples of harmful in a Sentence

DDT has been proven to be extremely harmful to the environment.
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.
Another growing problem is the use of harmful flame retardants in the plastic enclosures around batteries. Arlene Blum, Forbes, 8 Dec. 2024 While his anti-vaccine views have drawn widespread criticism, his stance on combating chronic disease by ridding the nation’s food supply of harmful chemicals and ingredients broadly aligns with efforts from both sides of the political aisle and has been praised by leading public health experts. Nik Popli, TIME, 6 Dec. 2024 So these algorithms and this messaging is really harmful for kids' self-image. Dana Taylor, USA TODAY, 6 Dec. 2024 Additionally, the brand touts the product as being free from harmful chemicals, dyes, and synthetic fragrances, which earned it some extra brownie points. Casey Clark, Better Homes & Gardens, 6 Dec. 2024 See all Example Sentences for harmful 

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of harmful was in the 14th century

Dictionary Entries Near harmful

Cite this Entry

“Harmful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/harmful. Accessed 21 Dec. 2024.

Kids Definition

harmful

adjective
harm·​ful ˈhärm-fəl How to pronounce harmful (audio)
: causing damage : injurious
harmfully adverb
harmfulness noun

Legal Definition

harmful

adjective
harm·​ful
: of a kind likely to cause harm
harmfully adverb
harmfulness noun

More from Merriam-Webster on harmful

Last Updated: - Updated example sentences
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