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.

Several have enacted laws regulating AI’s use in therapy, including mental-health chatbots, citing concerns that users can develop dangerous dependencies on the bots and that the technology has advanced quickly without sufficient guardrails.

From The Wall Street Journal • Jun. 30, 2026

"Even if it is unfair - of all the teams that Brazil could face as group winners, Japan were the most dangerous to them - these players were facing a historic humiliation."

From BBC • Jun. 29, 2026

“The only thing that matters is that the State knew it was dangerous and failed to do anything about it.”

From Los Angeles Times • Jun. 29, 2026

As millions of Americans brace for a dangerous heat wave this week, energy experts say they should prepare their wallets, too.

From MarketWatch • Jun. 29, 2026

The biggest, most dangerous thing I’ve ever done.

From "Code Name Kingfisher" by Liz Kessler

Vocabulary lists containing dangerous

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