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Synonyms
Examples of harmful in a Sentence
DDT has been proven to be extremely harmful to the environment.
Recent Examples on the Web
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
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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
Legal Definition
harmful
adjective
harm·ful
: of a kind likely to cause harm
harmfully
adverb
harmfulness
noun
More from Merriam-Webster on harmful
Nglish: Translation of harmful for Spanish Speakers
Britannica English: Translation of harmful for Arabic Speakers
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