1
as in hazardous
involving potential loss or injury
the soldiers were specially selected to go on a dangerous mission behind enemy lines
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in harmful
causing or capable of causing harm
the common knowledge that smoking is dangerous to one's health hasn't stopped some people
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of dangerous
Studies funded by the insurance industry and personal-injury law firms regularly cite I-55 as among the state’s most dangerous arteries, with Safe Roads USA ranking it in the top four.
—
The Editorial Board, Chicago Tribune, 26 Jan. 2026
Some stayed open to give a break to the protesters from the dangerous cold, providing water, coffee, snacks and hand warmer packets.
—Jack Brook, Los Angeles Times, 26 Jan. 2026
The Constitution is baked into Claude’s thinking; previous versions were softer guidelines, but as Claude becomes more powerful, its maker has added constraints on dangerous behavior.
—Manal Albarakati, semafor.com, 26 Jan. 2026
If tequila is your best friend, mezcal is your best friend’s dangerous cousin, the one who rides a motorcycle and smokes cigarettes.
—Jeremy Repanich, Robb Report, 24 Jan. 2026
See All Example Sentences for dangerous
The Editorial Board, Chicago Tribune, 26 Jan. 2026
Some stayed open to give a break to the protesters from the dangerous cold, providing water, coffee, snacks and hand warmer packets.
—Jack Brook, Los Angeles Times, 26 Jan. 2026
The Constitution is baked into Claude’s thinking; previous versions were softer guidelines, but as Claude becomes more powerful, its maker has added constraints on dangerous behavior.
—Manal Albarakati, semafor.com, 26 Jan. 2026
If tequila is your best friend, mezcal is your best friend’s dangerous cousin, the one who rides a motorcycle and smokes cigarettes.
—Jeremy Repanich, Robb Report, 24 Jan. 2026
See All Example Sentences for dangerous
Recent Examples of Synonyms for dangerous
Adjective
-
Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean.—
CA Weather Bot,
Sacbee.com,
4 Feb. 2026
-
Coming back from the dead can be hazardous to your health.—
Sydney Bucksbaum,
Entertainment Weekly,
4 Feb. 2026
Adjective
-
While skepticism toward artificial intelligence is understandable, dismissing AI as inherently harmful overlooks both history and reality.—
Arkansas Online,
Arkansas Online,
27 Jan. 2026
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Regulators will examine whether Grok is living up to its obligations under the Digital Services Act, the bloc’s wide-ranging rulebook for keeping internet users safe from harmful content and products.—
Kelvin Chan,
Chicago Tribune,
26 Jan. 2026
Adjective
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Competing on a shredded ligament sounds risky for long-term knee health, but that’s not necessarily the case, Daniel Kaplan, MD, an orthopedic surgeon and sports medicine specialist at NYU Langone Health, tells SELF.—
Korin Miller,
SELF,
3 Feb. 2026
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Our reporting reveals that members and related officials have encouraged protesters to impede law enforcement; pushed civilians toward legally and physically risky confrontations; and helped mobilize a counterprotest that turned violent.—
Christina Buttons,
Washington Post,
3 Feb. 2026
Adjective
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The opposite, overwatering, is also detrimental because the seeds may rot.—
Megan Hughes,
Better Homes & Gardens,
28 Jan. 2026
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There’s been tension between the dynamic guard and head coach Tuomas Iisalo and some of that started after the Grizzlies lost to the Lakers in October in which Morant scored only eight points and was later suspended for one game for conduct detrimental to the team for postgame comments.—
Broderick Turner,
Los Angeles Times,
28 Jan. 2026
Adjective
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The crises that Sundance faces—the lingering shadow of the pandemic, the perilous state of theatrical exhibition—are hardly Sundance’s alone.—
Justin Chang,
New Yorker,
31 Jan. 2026
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That being said, investing in a single stock without thorough analysis can be perilous.—
Trefis Team,
Forbes.com,
30 Jan. 2026
Adjective
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This is because free iron can catalyze reactive oxygen species, which may prove to be chemically damaging.—
Scott Travers,
Forbes.com,
30 Jan. 2026
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Emily Mendenhall traces the medical myths, gender bias, and neurological truths behind hysteria, one of history’s most damaging diagnoses.—
Big Think,
Big Think,
29 Jan. 2026
Adjective
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Farther inland, strong and persistent winds will still pose serious problems.—
Briana Waxman,
CNN Money,
30 Jan. 2026
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The victim was transported to the hospital with serious injuries that were not believed to be life-threatening.—
Stepheny Price,
FOXNews.com,
29 Jan. 2026
Adjective
-
Affected cosmetics that are applied to the skin or eyes may lead to skin irritation, infection, or other adverse reactions.—
Michele Laufik,
Martha Stewart,
30 Jan. 2026
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Even for women whose initial mammograms didn’t show any calcium buildup and were considered low risk, risk of an adverse cardiac incident increased by 41% if buildup was detected on followups.—
Helen Carefoot,
Flow Space,
30 Jan. 2026
Cite this Entry
“Dangerous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/dangerous. Accessed 5 Feb. 2026.
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