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.

And many American doctors initially opposed the procedure as dangerous, medically unproven, and expensive because of physicians’ often-hefty fees and the cost of maintaining facilities for quarantining people temporarily after they were inoculated.

From The Wall Street Journal • Apr. 14, 2026

Miller, of Gayton Road, had gone on trial in April 2025 after denying causing death by dangerous driving, but that trial was halted after lawyers said more time was needed.

From BBC • Apr. 14, 2026

“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

Professor David Lalloo, from the Liverpool School of Tropical Medicine says the bites from false widow spiders "are not dangerous".

From BBC • Apr. 13, 2026

It felt as if their eyes were connected by a high wire: dangerous and tense.

From "Code Name Kingfisher" by Liz Kessler

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