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.

But a smaller group behaves in a very different way, and their actions can be far more dangerous.

From Science Daily • Apr. 17, 2026

How Anthropic learned that Mythos was too dangerous for the wild.

From MarketWatch • Apr. 17, 2026

He kept the U.S. out of any major war and developed a nuclear strategy that evolved from “massive retaliation” to a policy that recognized how an all-or-nothing approach to thermonuclear weapons would be too dangerous.

From The Wall Street Journal • Apr. 15, 2026

Last year, the Product Regulation and Metrology Act 2025 was passed, providing a framework for a crackdown on dangerous products being sold online and entering the UK.

From BBC • Apr. 15, 2026

All the years of being told it was dangerous have left a mark and I’m shaking as I reach up to open the hatch.

From "Code Name Kingfisher" by Liz Kessler

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