1
as in unfavorable
opposed to one's interests
all the adverse publicity really caused the movie star's popularity to suffer
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in detrimental
causing or capable of causing harm
the adverse effects of the drug are too severe to allow it to be marketed
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of adverse
Extend it to four seconds to ensure safe spacing in adverse conditions.
—
Bay Area Weather Report, Mercury News, 25 Sep. 2025
For one, a high fever during early pregnancy has in some cases been linked to potential complications for the fetus, including neural tube defects and other adverse outcomes.
—Stephanie McNeal, Glamour, 23 Sep. 2025
To avoid adverse effects, aim to keep total caffeine from all beverages under 400 milligrams (mg) per day (most adults), and under 200 mg during pregnancy and breastfeeding.
—Sarah Jividen, Verywell Health, 23 Sep. 2025
The adverse events that occurred after both a first dose and a second dose were similar to those of other vaccines, including the intranasal flu vaccine, according to results published in August in NEJM Evidence.
—Tara Haelle, Scientific American, 23 Sep. 2025
See All Example Sentences for adverse
Bay Area Weather Report, Mercury News, 25 Sep. 2025
For one, a high fever during early pregnancy has in some cases been linked to potential complications for the fetus, including neural tube defects and other adverse outcomes.
—Stephanie McNeal, Glamour, 23 Sep. 2025
To avoid adverse effects, aim to keep total caffeine from all beverages under 400 milligrams (mg) per day (most adults), and under 200 mg during pregnancy and breastfeeding.
—Sarah Jividen, Verywell Health, 23 Sep. 2025
The adverse events that occurred after both a first dose and a second dose were similar to those of other vaccines, including the intranasal flu vaccine, according to results published in August in NEJM Evidence.
—Tara Haelle, Scientific American, 23 Sep. 2025
See All Example Sentences for adverse
Recent Examples of Synonyms for adverse
Adjective
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With Dart now the starter in New York, however, Ward will need to overcome unfavorable surroundings and orchestrate a Titans turnaround to stay in the top spot.—
Dane Brugler,
New York Times,
1 Oct. 2025
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After an unfavorable appeals court decision in December, Nasdaq stopped mandating companies disclose their board gender and diversity stats.—
Julia Boorstin,
CNBC,
30 Sep. 2025
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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And minimizing the ability for rival studios to make viable alternative games, critics argue, has had a negative effect on the quality of sports titles across the sector.—
Dan Bernstein,
Sportico.com,
26 Sep. 2025
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At the same time, Kirk’s admirers are campaigning to get people who make negative comments about those views—which are, after all, highly controversial and designedly so—fired from their jobs.—
Louis Menand,
New Yorker,
26 Sep. 2025
Adjective
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Hendryx also said the move would lead to more environmental destruction, more local air and water pollution from mining sites, more pollution from power plants, more harmful contributions to climate change emissions, and other negative impacts.—
John Feng,
MSNBC Newsweek,
1 Oct. 2025
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The lack of structure could have harmful consequences for kids in the long run.—
Elisabeth Sherman,
Parents,
1 Oct. 2025
Adjective
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Students from the kingdom are increasingly turning away from US universities in particular, put off by a mix of hostile immigration policies, concerns over gun violence, and the kingdom’s own push to grow its domestic education sector.—
Manal Albarakati,
semafor.com,
26 Sep. 2025
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The move to social media and algorithmic media was really a move toward a style of political communication that is somewhat hostile to the liberal project and the deliberative, open-minded, thoughtful, on-the-one-hand-on-the-other-hand mode of discourse that Obama is good at.—
David Remnick,
New Yorker,
26 Sep. 2025
Adjective
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Speaking to reporters for the first time since the opener, Prince on Friday took responsibility for the late substitutions that contributed to two damaging delay of game penalties late in the Week 2 loss against the Patriots.—
Barry Jackson,
Miami Herald,
26 Sep. 2025
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In just a matter of hours, damaging winds and record-breaking flooding started to devastate many areas, especially the higher terrains of the southeastern Appalachians.—
Sam Gillette,
PEOPLE,
26 Sep. 2025
Adjective
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This neurological response evolved to keep our ancestors alive in genuinely dangerous situations.—
Anne-Laure Le Cunff,
Big Think,
29 Sep. 2025
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In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain.—
CA Weather Bot,
Sacbee.com,
29 Sep. 2025
Adjective
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Many of the people opining and whining about how this moment could be as bad or worse than the 2000 bust are uninformed or ahistorical.—
Jim Cramer,
CNBC,
28 Sep. 2025
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Thankfully, my passport wasn’t stolen, nor was it stranded somewhere in the middle of the rainforest (my worst fear at the time).—
Amelia McBride,
Travel + Leisure,
28 Sep. 2025
Cite this Entry
“Adverse.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/adverse. Accessed 3 Oct. 2025.
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