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
Early signals show a growing chance of dangerous heat building across the South, Southeast and into parts of the Mid-Atlantic during the days leading up to the holiday.
—
Brandi D. Addison,
USA Today,
22 June 2026
One study says people globally suffered an average of 41 extra days of dangerous heat in 2024.
—
Alexa St. John,
Fortune,
22 June 2026
Public safety officials issued an emergency alert about an armed and dangerous suspect in the area, asking residents to shelter in place.
—
ABC News,
22 June 2026
Before some of the storms develop, there will be dangerous heat to contend with.
—
Troy Bridges,
CBS News,
22 June 2026
See All Example Sentences for dangerous
Brandi D. Addison,
USA Today,
22 June 2026
One study says people globally suffered an average of 41 extra days of dangerous heat in 2024.
—
Alexa St. John,
Fortune,
22 June 2026
Public safety officials issued an emergency alert about an armed and dangerous suspect in the area, asking residents to shelter in place.
—
ABC News,
22 June 2026
Before some of the storms develop, there will be dangerous heat to contend with.
—
Troy Bridges,
CBS News,
22 June 2026
See All Example Sentences for dangerous
Recent Examples of Synonyms for dangerous
Adjective
-
Concrete casing and tubing – used to seal and extract oil – can lose integrity, causing leaks and potential hazardous gas releases.
-
Concerns about hazardous chemicals led police to suggest residents evacuate, although many declined.
Adjective
-
Telegram said its moderation systems remove millions of pieces of harmful content each month, including non-consensual pornography.
-
Developing a negative self-view as a result of these harmful experiences during your formative years is not uncommon.
Adjective
-
It is meant to make a major war, especially a nuclear war, too risky for the enemy to start.
-
Wall Street amplified the problem by bundling risky mortgages into securities that spread losses throughout the financial system.
Adjective
-
According to 24/7 Wall Street, the $60 billion all-stock AI company Anysphere acquisition, a $20 billon debt offering, and the future end of the lockup have been particularly detrimental to the maintenance of the share prices.
-
There’s also the thought that onboarding a starting catcher midseason can be detrimental to a pitching staff, something that Yankees general manager Brian Cashman has expressed in the past.
Adjective
-
Understanding the gravity of a red flag warning and adhering to these precautions is paramount in averting wildfires during these perilous conditions.
-
They are packed by smugglers into small and unsafe boats, with thousands dying during the perilous sea journey.
Adjective
-
There is still time for boards to shape how AI is adopted before damaging practices become normalized.
-
Now, researchers report that such a quake could be more widespread and damaging than previously thought.
Adjective
-
What Research Shows About Cancer in Dogs While there is no evidence that turkey tail shrinks tumors, the mushroom has drawn real scientific interest as a complementary therapy for serious illness.
-
The new guidance was heavily criticized by health groups, which argued the decision could sow confusion and leave children vulnerable to serious disease.
Adjective
-
If an underwriting decision goes against you, ask for the reason; New York's rule, and others like it, were written partly to force insurers to explain adverse decisions rather than shrug at them.
-
These conditions can increase your vulnerability to adverse effects from poor air quality.
Cite this Entry
“Dangerous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/dangerous. Accessed 27 Jun. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
