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.

About one-third would likely consist of footage already shot, including performances from the 1990s Dangerous tour and the 2000s Invincible tour, Fogelson and King said.

From The Wall Street Journal • Apr. 22, 2026

And in a class titled “Free Speech and Dangerous Ideas,” where exclusively controversial topics are discussed, the professor turned the microphone over to his students and didn’t interfere once, according to Chancellor Daniel Diermeier.

From The Wall Street Journal • Oct. 16, 2025

The original Dangerous Dogs Act "changed my life" as a surgeon, she admitted.

From BBC • Oct. 7, 2025

Dangerous waves that rose more than 10 feet never materialized outside of Russia, and even there, officials had no reports of deaths, and damage appeared to be limited.

From Los Angeles Times • Jul. 30, 2025

“Got to use good grammar. Don’t wanna upset Dangerous Grangerous.”

From "Frindle" by Andrew Clements

Vocabulary lists containing dangerous

Words Every Pirate Should Know

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

"Volcano!"

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

"Brothers in Hope"

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!