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hazardous

[haz-er-duh s] /ˈhæz ər dəs/
adjective
1.
full of risk; perilous; risky:
a hazardous journey.
2.
dependent on chance.
Origin of hazardous
1570-1580
1570-80; hazard + -ous
Related forms
hazardously, adverb
hazardousness, noun
nonhazardous, adjective
nonhazardously, adverb
nonhazardousness, noun
ultrahazardous, adjective
unhazardous, adjective
unhazardously, adverb
Synonyms
1. dangerous, unsafe. 2. chancy, uncertain, risky, speculative.
Antonyms
1. safe, secure. 2. sure, certain, reliable.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for hazardous
Contemporary Examples
Historical Examples
  • Now, I resent the romantic idea that marriage should be a hazardous mystery—at least to the woman.

    Women's Wild Oats C. Gasquoine Hartley
  • Jack watched them with no little anxiety, for the expedition was a hazardous one.

    The Three Commanders W.H.G. Kingston
  • Already there were many in the Turkish camp who thought the enterprise too hazardous to continue.

    Constantinople William Holden Hutton
  • Yet the lad was in a hazardous situation, and to himself he did not disguise the fact.

    The Camp in the Snow William Murray Graydon
  • Night-flying is one of the most hazardous duties of the aviator, the chief danger being in landing.

British Dictionary definitions for hazardous

hazardous

/ˈhæzədəs/
adjective
1.
involving great risk
2.
depending on chance
Derived Forms
hazardously, adverb
hazardousness, 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
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Word Origin and History for hazardous
adj.

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

Online Etymology Dictionary, © 2010 Douglas Harper
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