hazardous

[haz-er-duhs]

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adjective

full of risk; perilous; risky: a hazardous journey.

dependent on chance.

Nearby words

Origin of hazardous

First recorded in 1570–80; hazard + -ous

SYNONYMS FOR hazardous

1. dangerous, unsafe. 2. chancy, uncertain, risky, speculative.

SEE MORE SYNONYMS FOR hazardous ON THESAURUS.COM

ANTONYMS FOR hazardous

1. safe, secure. 2. sure, certain, reliable.

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Related forms

haz·ard·ous·ly, adverbhaz·ard·ous·ness, nounnon·haz·ard·ous, adjectivenon·haz·ard·ous·ly, adverb

non·haz·ard·ous·ness, nounul·tra·haz·ard·ous, adjectiveun·haz·ard·ous, adjectiveun·haz·ard·ous·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hazardous

Refinery management had normalized the occurrences of hazardous conditions.
Oil Tankers Leaking into Seattle’s Water|Bill Conroy|October 13, 2014|DAILY BEAST
Warning: NSFW in places where facial spasms and eye moistness could be hazardous.
Move Over, Ladies: Dove Does Dads|Andy Hinds|June 17, 2014|DAILY BEAST
It's not fun to conduct a hazardous snatch of an insurgent leader, only to find you grabbed the wrong guy.
Special Ops’ Weapons Wish List|Michael Peck|April 9, 2014|DAILY BEAST
And not knowing what could be in your genetic future is hazardous to your health.
23andMe and Me: Why Policymakers Should Set the Genetic Testing Company Free|Charles C. Johnson|February 4, 2014|DAILY BEAST

“There are still cars filled with gasoline,” said Sûreté du Québec Sgt. Michel Brunet about the hazardous scene.
Inside the Brutal Clean-up Efforts in Lac-Megantic|Christine Pelisek|July 16, 2013|DAILY BEAST
The Count de Fersen was the principal agent and confidant of this hazardous enterprise.
History of the Girondists, Volume I|Alphonse de Lamartine
About themselves they are naturally taciturn, and public and unfriendly criticism has been proved to be a hazardous diversion.
Sergeant York And His People|Sam Cowan
But the risk was undeniable, and illustrates the hazardous nature of the enterprise.
The Great Events by Famous Historians, v. 13|Various
Thus the captain and his second separated to meet again at the appointed hour for the hazardous undertaking.
Fanny Campbell, The Female Pirate Captain|Maturin Murray Ballou
Meanwhile, Etienne Brule had found cause to rue the hour when he undertook his hazardous mission to the Carantonan allies.
Pioneers Of France In The New World|Francis Parkman, Jr.

British Dictionary definitions for hazardous

hazardous

adjective

involving great risk

depending on chance

Derived Formshazardously, adverbhazardousness, 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

Word Origin and History for hazardous

hazardous

adj.

1580s, "venturesome;" 1610s, "perilous," from hazard (n.) + -ous or from Middle French hasardeux (16c.).

hazardous

adjective

RELATED WORDS

Nearby words

Origin of hazardous

Examples from the Web for hazardous

hazardous

adjective

hazardous