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.

The fight only begins with the fact that the latest cutting-edge U.S. models, led by Anthropic’s Mythos, seem to be uncannily good at finding dangerous and unsuspected vulnerabilities in all major software systems.

From The Wall Street Journal • May 19, 2026

The team hopes future work will provide a clearer picture of how dangerous these secondary faults may be for the Seattle metropolitan region, home to roughly four million people.

From Science Daily • May 19, 2026

Wind-driven fires on a dry landscape are extremely dangerous, as multiple fast-moving wildfires in the last two years have shown.

From Los Angeles Times • May 19, 2026

To me, that’s not putting your body in a dangerous situation.

From Slate • May 19, 2026

“I would climb mountains and traverse dangerous cliff paths. I would poke my head into dark caves and push over heavy boulders.”

From "The Very, Very Far North" by Dan Bar-el

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