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.

In his letter, Healey said he was first given full sight of the DIP on Monday, revealing that it "falls well short of what is required for defence and the country at this dangerous time".

From Barron's • Jun. 11, 2026

A dangerous tapeworm that has been spreading across North America has now been detected in the Pacific Northwest, according to new research.

From Science Daily • Jun. 11, 2026

"Although rescue isn't a core mission of the vessel, it was clearly good for a dirty, dangerous missions like this."

From BBC • Jun. 11, 2026

Here’s the uncomfortable truth about risk: It disappears from view exactly when it’s most dangerous.

From MarketWatch • Jun. 11, 2026

It is too dangerous to continue the planned journey to Burma—there is concern that the Japanese might bomb the Grant—so the captain changes course for Australia, with plans to dock in Manila along the way.

From "At Last She Stood" by Erin Entrada Kelly

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