hazardous

[haz-er-duhs]

See more synonyms for hazardous on Thesaurus.com

adjective

full of risk; perilous; risky: a hazardous journey.
dependent on chance.

Origin of hazardous

First recorded in 1570–80; hazard + -ous

Related formshaz·ard·ous·ly, adverbhaz·ard·ous·ness, nounnon·haz·ard·ous, adjectivenon·haz·ard·ous·ly, adverbnon·haz·ard·ous·ness, nounul·tra·haz·ard·ous, adjectiveun·haz·ard·ous, adjectiveun·haz·ard·ous·ly, adverb

Synonyms

See more synonyms for on Thesaurus.com

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

Antonyms

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for hazardous

Contemporary Examples

Refinery management had normalized the occurrences of hazardous conditions.
Oil Tankers Leaking into Seattle’s Water
Bill Conroy
October 13, 2014
Warning: NSFW in places where facial spasms and eye moistness could be hazardous.
Move Over, Ladies: Dove Does Dads
Andy Hinds
June 17, 2014
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
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
“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

Historical Examples

Of all the hazardous ventures in which the detective had been engaged, this was certainly not the least hazardous.
Henry Dunbar
M. E. Braddon
This is a strange and hazardous situation in which we are placed.
Homeward Bound
James Fenimore Cooper
Wherever he had elected to crouch and tremble, it was too hazardous to go near him.
Nostromo: A Tale of the Seaboard
Joseph Conrad
The condition of his heart was hazardous and she had been told that any excitement might be fatal.
The Paliser case
Edgar Saltus
The descent was as anxious and hazardous as the ascent had been laborious.
Ten Thousand Miles with a Dog Sled
Hudson Stuck

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

adj.

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

hazardous

Origin of .css-1fxfie5{font-size:22px;}@media (max-width:768px){.css-1fxfie5{font-size:18px;margin:0 10px 10px 0;word-break:break-all;word-wrap:break-word;-webkit-hyphens:auto;-moz-hyphens:auto;-ms-hyphens:auto;hyphens:auto;line-height:22px;}}hazardous

Synonyms

Antonyms

Related Words

Examples from the Web for hazardous

Contemporary Examples

Refinery management had normalized the occurrences of hazardous conditions.

Warning: NSFW in places where facial spasms and eye moistness could be hazardous.

It's not fun to conduct a hazardous snatch of an insurgent leader, only to find you grabbed the wrong guy.

And not knowing what could be in your genetic future is hazardous to your health.

“There are still cars filled with gasoline,” said Sûreté du Québec Sgt. Michel Brunet about the hazardous scene.

Historical Examples

Of all the hazardous ventures in which the detective had been engaged, this was certainly not the least hazardous.

This is a strange and hazardous situation in which we are placed.

Wherever he had elected to crouch and tremble, it was too hazardous to go near him.

The condition of his heart was hazardous and she had been told that any excitement might be fatal.

The descent was as anxious and hazardous as the ascent had been laborious.

hazardous

Word Origin and History for hazardous

adj.

Origin of hazardous