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.

Maybe Ivory Coast, Senegal or Ghana - all dangerous on their day.

From BBC • Jun. 10, 2026

Law enforcement officials also point out that any type of modification to e-bikes might not just be dangerous, but can also transform the e-bike into a motorcycle or moped under California law.

From Los Angeles Times • Jun. 10, 2026

That’s real hope amid this dangerous, uncertain moment.

From Salon • Jun. 9, 2026

Anthropic is releasing a next-generation “Mythos-class” model to the general public with guardrails that remove dangerous capabilities related to areas such as cybersecurity and biological research.

From The Wall Street Journal • Jun. 9, 2026

Nim loved the ocean because it was always there, wherever she looked and as far as she could see, but it was too huge and powerful to understand and too dangerous to trust.

From "Nim’s Island" by Wendy Orr

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