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
Relevance
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
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.
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
-
This week, a powerful winter storm dumped a hazardous mix of snow, ice, and sleet across much of the United States, knocking out power to hundreds of thousands of homes, grounding flights, closing schools, and disrupting the lives of more than 200 million Americans.—
Cat Ward,
Forbes.com,
29 Jan. 2026
-
Most areas in North Texas were covered in ice, sleet and snow, creating hazardous conditions.—
Stephen Sorace,
FOXNews.com,
29 Jan. 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
-
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
-
Dell is finally good at something—but as her behavior becomes riskier and a shadowy troll threatens to expose her dark past, Dell must reckon with what her digital life ignores, and what real redemption means.—
Danielle Parker,
CBS News,
27 Jan. 2026
-
The statistic is built on what specific living individuals are willing to pay for small risk reductions in their own lives (often estimated via surveys or observing wage premiums for risky jobs).—
James Broughel,
Forbes.com,
27 Jan. 2026
Adjective
-
What’s more, inability to heal these relationships can be detrimental to physical and emotional well-being, and even longevity.—
Richard Balkin,
The Conversation,
26 Jan. 2026
-
Yet none of those losses, Gottlieb points out, has been all that detrimental to the Trojans’ tournament resume.—
Ryan Kartje,
Los Angeles Times,
24 Jan. 2026
Adjective
-
Moreover, investing in a single stock without thorough analysis can be perilous.—
Trefis Team,
Forbes.com,
23 Jan. 2026
-
Both North Texas and neighboring Oklahoma are expected to be hit hard by the winter storm, with both anticipating perilous roadway conditions and power outages from a combination of freezing rain, ice, sleet, snow and strong wind gusts.—
Lauren Caruba,
Dallas Morning News,
23 Jan. 2026
Adjective
-
Spending six months in discussion with investors who delay decisions or funding can be deeply damaging to a young company.—
Alison Coleman,
Forbes.com,
23 Jan. 2026
-
The storm is part of a major, widespread winter system that's likely to spread damaging ice and heavy snow across several southern states, like Texas and Oklahoma, into the Carolinas and mid-Atlantic states.—
Cheyenne Derksen,
Oklahoman,
23 Jan. 2026
Adjective
-
Farther inland, strong and persistent winds will still pose serious problems.—
Briana Waxman,
CNN Money,
30 Jan. 2026
-
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
-
For example, statins are known to be one of the most efficacious treatments to lower LDL and have shown remarkable impact in reducing the risk of adverse cardiovascular outcomes.—
Forbes.com,
Forbes.com,
25 Jan. 2026
-
The extra calories can help their bodies keep them warm, but they should not be overfed, which can have an adverse effect.—
Riley Rourke,
CBS News,
24 Jan. 2026
Cite this Entry
“Dangerous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/dangerous. Accessed 31 Jan. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
