as in detrimental
causing or capable of causing harm
DDT has been proven to be extremely harmful to the environment
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Recent Examples of harmful
These results, along with other research, suggest that there might be a cumulative harmful effect of repeat COVID-19 infections on the body, and scientists are trying to better understand those potential long-term effects.
—
Alice Park, Time, 1 Oct. 2025
Some products may contain strains other than the ones listed, which could have harmful effects.
—Isabel Vasquez Rd Ldn, Health, 1 Oct. 2025
The best course of action is to report them, so providers can develop better ways to identify harmful or unwanted messages.
—Kurt Knutsson, FOXNews.com, 30 Sep. 2025
Fabric mats are usually made from polyester, which can have potentially harmful chemicals.
—Bestreviews, Mercury News, 29 Sep. 2025
See All Example Sentences for harmful
Alice Park, Time, 1 Oct. 2025
Some products may contain strains other than the ones listed, which could have harmful effects.
—Isabel Vasquez Rd Ldn, Health, 1 Oct. 2025
The best course of action is to report them, so providers can develop better ways to identify harmful or unwanted messages.
—Kurt Knutsson, FOXNews.com, 30 Sep. 2025
Fabric mats are usually made from polyester, which can have potentially harmful chemicals.
—Bestreviews, Mercury News, 29 Sep. 2025
See All Example Sentences for harmful
Recent Examples of Synonyms for harmful
Adjective
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Overwatering mums is just as detrimental as underwatering.—
Kim Toscano,
Southern Living,
30 Sep. 2025
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Trump warned that major changes could occur — which could be detrimental to Democrats — if the government runs out of funding.—
Brendan Rascius,
Miami Herald,
30 Sep. 2025
Adjective
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While many consider the mammal a nuisance for raiding garbage cans and damaging property, raccoons can also carry diseases, and they probably shouldn't be kept as housepets.—
Marina Johnson,
Louisville Courier Journal,
3 Oct. 2025
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Additional details about the texts could also be more damaging to Robinson's defense, Lazaro said.—
Michael Ruiz,
FOXNews.com,
3 Oct. 2025
Adjective
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So quick, so dangerous in the final third, and surely so motivated to revive his career in a World Cup year.—
Tim Spiers,
New York Times,
7 Oct. 2025
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But even hanging around the base camp can be dangerous, as hundreds of holiday makers were trapped when the area was hit in an unexpected blizzard over the weekend.—
Kaijing Xiao,
ABC News,
6 Oct. 2025
Adjective
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Concerns or reports of adverse effects can be directed to the FDA's Human Foods Program at 1-888-SAFEFOOD (1-888-723-3366).—
Matt Cannon,
MSNBC Newsweek,
1 Oct. 2025
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Such issues include severe weather impacts, adverse road conditions and trash buildups that pose a threat to human and/or wildlife health.—
Michael Salerno,
AZCentral.com,
1 Oct. 2025
Adjective
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The game didn’t start bad for the Giants.—
Dan Duggan,
New York Times,
6 Oct. 2025
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Apparently, Grier forgot his own words, because the lines that the Dolphins have built are collectively their worst this decade, something evident in a crushing 27-24 loss to Carolina, a game in which Miami blew a 17-0 lead.—
Barry Jackson,
Miami Herald,
5 Oct. 2025
Cite this Entry
“Harmful.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/harmful. Accessed 7 Oct. 2025.
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