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.

“But if the next step is a naval clash, attacks on Gulf energy infrastructure, or a widening of regional military operations, then the market will start to price a much more dangerous scenario,” she cautioned.

From Barron's • Apr. 13, 2026

Arendt had written her dissertation on St. Augustine, who held curiosity to be dangerous, often tempting one to sin because of an insatiable hunger for one sight after another.

From The Wall Street Journal • Apr. 12, 2026

Kildunne looked dangerous throughout the game to put what was a poor first-half error behind her.

From BBC • Apr. 11, 2026

But Bass and every council member and all their successors need to be reminded that a civic sense of intractability is a dangerous thing.

From Los Angeles Times • Apr. 11, 2026

On a desk in Las Vegas, film from infrared cameras revealing new, dangerous sources of heat coming from the bulge sat, unopened and unexamined.

From "Mountain of Fire" by Rebecca E. F. Barone

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