dangerous

[ deyn-jer-uhs, deynj-ruhs ]

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

/ ˈdeɪndʒərəs /

adjective

1. causing danger; perilous

Derived Forms

• ˈdangerousness, noun
• ˈdangerously, adverb

Other Words From

• danger·ous·ly adverb
• danger·ous·ness noun
• non·danger·ous adjective
• non·danger·ous·ly adverb
• non·danger·ous·ness noun
• quasi-danger·ous adjective
• quasi-danger·ous·ly adverb
• semi·danger·ous adjective
• semi·danger·ous·ly adverb
• semi·danger·ous·ness noun
• un·danger·ous adjective
• un·danger·ous·ly adverb

Word History and Origins

Origin of dangerous¹

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

Idioms and Phrases

see little knowledge is a dangerous thing ; live dangerously .

Example Sentences

‘Fluoridation is the most monstrously conceived and dangerous Communist plot we have ever had to face.’

From Los Angeles Times

Whooping cough — a highly contagious and potentially dangerous illness — has surged in California this year, staging a comeback to levels not seen since the start of the COVID-19 pandemic.

From Los Angeles Times

The Home Office said police would also get stronger powers to deal with "the scourge of off-road bikes in public parks and dangerous e-scooters on pavements, street racing and cruising".

From BBC

Gunners fans will be hoping that he can lift the team, and help them look more dangerous in open play.

From BBC

“It’s a very dangerous thing because we want to have great companies,” Trump said in an October interview moderated by Bloomberg News.

From Los Angeles Times

Related Words

• alarming
• bad
• critical
• deadly
• fatal
• nasty
• perilous
• precarious
• risky
• serious
• terrible
• threatening
• treacherous
• ugly
• unhealthy
• unsafe
• unstable