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.

Fable comes with broad restrictions Anthropic says are aimed at kneecapping its ability to assist users with potentially dangerous activities.

From The Wall Street Journal • Jun. 11, 2026

That's where many residents are still dealing with the fallout from the discovery that their homes were built with a potentially dangerous building material.

From BBC • Jun. 10, 2026

The incident occurred while much of the Southern California coast is experiencing dangerous conditions.

From Los Angeles Times • Jun. 10, 2026

Coal mines often leach dangerous chemicals like arsenic into waterways and are required to strictly monitor pollution discharge and keep it under certain limits.

From Salon • Jun. 10, 2026

He smiled, but it was a dangerous smile.

From "Found" by Margaret Peterson Haddix

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