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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.

Doctors say they have achieved the previously impossible - restoring sight and preventing blindness in people with a rare but dangerous eye conditon called hypotony.

From BBC

Posted signage throughout the terminal warns everyone who lands at a New York airport about overpriced and potentially dangerous scam rides.

From Salon

Mr Barrington said Wolves of Wiltshire have specific licenses that allow them to care for the animals, because they were an "unknown quantity, and they could have potentially required a dangerous animals license".

From BBC

High temperatures and dry winds combined to form some of the most dangerous bushfire conditions since the "Black Summer" blazes.

From Barron's

The justices said the domestic abuser ban fit in a larger historical tradition of banning dangerous people from guns — explicitly rejecting the idea that lawmakers today must show a “historical twin.”

From Los Angeles Times