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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.

"There's no reason for it and it leads people unsuspectingly on to a dangerous footpath, which is the path that Suzie fell from," he said.

From BBC

"She always goes 110 percent, there’s never anything less, so I know she put her whole heart into it and sometimes things happen. It's a very dangerous sport."

From Barron's

Their imagined victory is completely impossible, profoundly dangerous and breathtaking in scale.

From Salon

They are turning into a dangerous and cohesive pairing - and England have been crying out for a midfield combination with those qualities for ages.

From BBC

“MHF is simply too dangerous to use. It is a flesh-eating, low-crawling, toxic vapor cloud. Our communities will not be safe until this chemical is gone.”

From Los Angeles Times