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Synonyms

dangerous

American  
[deyn-jer-uhs, deynj-ruhs] / ˈdeɪn dʒər əs, ˈdeɪndʒ rəs /

adjective

  1. full of danger danger or risk; causing danger; danger; perilous; risky; hazardous; unsafe.

  2. able or likely to cause physical injury.

    a dangerous criminal.


dangerous British  
/ ˈdeɪndʒərəs /

adjective

  1. causing danger; perilous

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

dangerous Idioms  
  1. see little knowledge is a dangerous thing; live dangerously.


Other Word Forms

  • dangerously adverb
  • dangerousness noun
  • nondangerous adjective
  • nondangerously adverb
  • nondangerousness noun
  • quasi-dangerous adjective
  • quasi-dangerously adverb
  • semidangerous adjective
  • semidangerously adverb
  • semidangerousness noun
  • undangerous adjective
  • undangerously adverb

Etymology

Origin of dangerous

First recorded in 1175–1225; Middle English da(u)ngerous “domineering, fraught with danger,” from Old French dangereus “threatening, difficult,” equivalent to dangier ( danger ) + -eus -ous

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.

The loans “become dangerous … when they are used to preserve a lifestyle instead of solve a balance-sheet problem,” said Justin Rice, a certified financial planner at Hamilton, N.J.-based Personal Wealth Strategies.

From MarketWatch

Tesla’s robotaxis rolled out in Austin, Texas, last summer, where witnesses said the vehicles glitched and made dangerous driving decisions.

From Los Angeles Times

“All we need are some horror stories” about misdiagnoses or dangerous advice, “and that whole area is tarred.”

From Los Angeles Times

Horta alleged that the shelter employee who brought Maximus to her car negligently failed to control him and never told her the dog could be dangerous.

From Los Angeles Times

Chronic unemployment is pushing many young people from the region to attempt dangerous migratory routes seeking better opportunities in Europe and the Middle East.

From BBC