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.

In his letter, Healey said he was first given full sight of the DIP on Monday, revealing that it "falls well short of what is required for defence and the country at this dangerous time".

From Barron's • Jun. 11, 2026

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

From MarketWatch • Jun. 11, 2026

“At this stage, it is too early to say whether the current escalation marks a full resumption of hostilities or a dangerous but still containable episode,” Rystad Energy’s Jorge Leon said in an email.

From The Wall Street Journal • Jun. 11, 2026

A safety system detected dangerous levels of engine thrust, assumed a malfunction, and ordered the fuel supply to be cut off, the theory goes.

From BBC • Jun. 10, 2026

It was strange feeling that this thing that we were inside was so dangerous we couldn’t even say the word out loud.

From "Code Name Kingfisher" by Liz Kessler

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!