Try Our Apps


The Best Internet Slang


[deyn-jer-uh s, deynj-ruh s] /ˈdeɪn dʒər əs, ˈdeɪndʒ rəs/
full of danger or risk; causing danger; perilous; risky; hazardous; unsafe.
able or likely to cause physical injury:
a dangerous criminal.
Origin of dangerous
1175-1225; Middle English da(u)ngerous domineering, fraught with danger < Old French dangereus threatening, difficult, equivalent to dangier (see danger) + -eus -ous
Related 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 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for dangerousness
Historical Examples
  • It was not his intelligence which he thought we underrated, but his dangerousness.

    Prester John John Buchan
  • August paused a moment, checked by a sense of the dangerousness of his undertaking.

    The End Of The World Edward Eggleston
  • He was like an elephant in his hugeness, and suppleness, his dangerousness, and his gentleness.

    Mount Music

    E. Oe. Somerville and Martin Ross
  • The dangerousness may either lie in the nature of a person or thing, or be imposed upon it.

  • Never a calf of them will desert to Rawhide, for all their dangerousness; nor I ain't goin' to have any fuss over it.

    The Virginian Owen Wister
  • The dangerousness, the excitingness, of being rich struck Mr. Prohack very forcibly.

    Mr. Prohack

    E. Arnold Bennett
  • All their plottings, their threats, their dangerousness dissipated like mist before the command of this one resolute man.

    The Mystery Stewart Edward White and Samuel Hopkins Adams
  • After the microbe has been found and named his dangerousness remains unattenuated.

    The Secret Life

    Elizabeth Bisland
  • The dangerousness of their characters first began to reveal itself after they had become dangerous by their present position.

  • I was often compelled, by the dangerousness of the way, to deviate considerably from the direction I wished to pursue.

    Caleb Williams William Godwin
British Dictionary definitions for dangerousness


causing danger; perilous
Derived Forms
dangerously, adverb
dangerousness, noun
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
Cite This Source
Word Origin and History for dangerousness



early 13c., "difficult, arrogant, severe" (the opposite of affable), from Anglo-French dangerous, Old French dangeros (12c., Modern French dangereux), from danger (see danger).

In Chaucer, it means "hard to please, reluctant to give;" sense of "full of danger, risky" is from late 15c. Other words used in this sense included dangersome (1560s), dangerful (1540s). Related: Dangerously.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Idioms and Phrases with dangerousness
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for dangerous

Many English speakers likely know this word

Word Value for dangerousness

Scrabble Words With Friends

Nearby words for dangerousness