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Definitions

dangerous

[deyn-jer-uhs, deynj-ruhs] / ˈdeɪn dʒər əs, ˈdeɪndʒ rəs /
ADJECTIVE
hazardous, troubling
Synonyms
STRONGEST
alarming bad critical deadly fatal nasty perilous precarious risky serious terrible threatening treacherous ugly unhealthy unsafe unstable
STRONG
no-go
WEAK
breakneck chancy dangersome delicate dynamite exposed formidable hairy heavy hot impending impregnable insecure jeopardous loaded malignant menacing mortal on collision course parlous portentous pressing queasy serpentine shaky speculative thorny ticklish touch-and-go touchy urgent viperous vulnerable wicked
Antonyms
STRONGEST
OK agreeable certain good great happy harmless healthful healthy honest kind nice pleasant pleasing safe secure stable strong sure trivial true unimportant wholesome wonderful
WEAK
careful guarded unhazardous untroubled

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"We had some good chances, credit to them they did too. We're in the business end of the season now. We always feel dangerous - we always feel like we can score goals for sure."

From BBC • Apr. 7, 2026

Mythos is so capable at potentially dangerous things such as exploiting software bugs that Anthropic said it presently has no plans to release Mythos to the public.

From The Wall Street Journal • Apr. 7, 2026

Cholera, a dangerous bacterial infection that causes severe diarrhea and can be fatal without treatment, may be significantly reduced through diet.

From Science Daily • Apr. 7, 2026

"This was an incredibly dangerous mission," Caine said.

From Barron's • Apr. 6, 2026

"You certainly did. We all need to be reminded about how dangerous fire can be, right?"

From "All About Sam" by Lois Lowry