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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.

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

"Clinical trials generally identify the most dangerous side effects of drugs," says Ungar.

From Science Daily • May 24, 2026

Rice has emerged as a star this season, partnering with Aaron Judge to form the most dangerous power duo in baseball.

From The Wall Street Journal • May 21, 2026

Meggie had expected the snakes to be bigger, but Elinor assured her that the smallest were the most dangerous.

From "Inkheart" by Cornelia Funke