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Synonyms

hazardous

American  
[haz-er-duhs] / ˈhæz ər dəs /

adjective

  1. full of risk; perilous; risky.

    a hazardous journey.

    Synonyms:
    unsafe, dangerous
    Antonyms:
    secure, safe
  2. dependent on chance.

    Synonyms:
    speculative, risky, uncertain, chancy
    Antonyms:
    sure, reliable, certain

hazardous British  
/ ˈhæzədəs /

adjective

  1. involving great risk

  2. depending on chance

"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

Other Word Forms

  • hazardously adverb
  • hazardousness noun
  • nonhazardous adjective
  • nonhazardously adverb
  • nonhazardousness noun
  • ultrahazardous adjective
  • unhazardous adjective
  • unhazardously adverb

Etymology

Origin of hazardous

First recorded in 1570–80; hazard + -ous

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Detective work was proving to be more hazardous than it originally seemed.

From Literature

The cold weather has also made the roads particularly hazardous, with Fintraffic warning of icy conditions in the region.

From BBC

Shaun Jones, AA expert patrol, urged drivers to consider delaying their journey or work from home if possible, adding wintry conditions could "reduce visibility in seconds" leading to familiar routes becoming "hazardous very quickly".

From BBC

A few workers remain on the line, mostly near the front to watch for hazardous items.

From The Wall Street Journal

The fountain “contains deteriorated concrete, corroded structural steel and hazardous materials and its mechanical and electrical systems are beyond repair,” Goodwin said.

From The Wall Street Journal