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most dangerous

ADJECTIVE

hazardous, troubling

Synonyms

STRONGEST

alarming bad critical deadly fatal nasty perilous precarious risky serious terrible threatening treacherous ugly unhealthy unsafe unstable

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.

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

From MarketWatch • Jun. 11, 2026

That began with the shocked roar that met Rush’s first number, 1977’s “Xanadu,” a chugging slab of custom-van-tested shag splendor, akin to kicking off a trick show with the most dangerous stunt.

From Los Angeles Times • Jun. 8, 2026

Bannon has called AI "the most dangerous technology in the history of mankind."

From Barron's • Jun. 2, 2026

"Melanoma, the most dangerous skin cancer, is now the fifth commonest cancer in the UK."

From BBC • May 26, 2026

At a White House meeting, the president’s top foreign policy advisor put it bluntly: “Daniel Ellsberg is the most dangerous man in America. He must be stopped at all costs.”

From "Most Dangerous: Daniel Ellsberg and the Secret History of the Vietnam War" by Steve Sheinkin