hazardous

[ haz-er-duhs ]

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

/ ˈhæzədəs /

adjective

1. involving great risk
2. depending on chance

Derived Forms

• ˈhazardously, adverb
• ˈhazardousness, noun

Other Words From

• hazard·ous·ly adverb
• hazard·ous·ness noun
• non·hazard·ous adjective
• non·hazard·ous·ly adverb
• non·hazard·ous·ness noun
• ultra·hazard·ous adjective
• un·hazard·ous adjective
• un·hazard·ous·ly adverb

Word History and Origins

Origin of hazardous¹

First recorded in 1570–80; hazard + -ous

Example Sentences

"Numerous flash floods, hazardous travel, power outages, and tree damage can be expected as the storm reaches max intensity," the National Weather Prediction Centre wrote in a post on X.

From BBC

Trump appointees changed part of the analysis so the chemical might look less hazardous.

From Science Magazine

“Numerous flash floods, hazardous travel, power outages, and tree damage can be expected as the storm reaches max intensity” on Wednesday.

From Los Angeles Times

It was a pick well rewarded with an early goal from Aston Villa's striker that turned a potentially hazardous task into an easy one.

From BBC

One in particular — Phos-Chek LC-95W — had “potentially alarming” concentrations of several metals, including chromium, cadmium and vanadium, he said, adding that the substance could be classified as hazardous waste under federal and California regulations.

From Los Angeles Times

Related Words

• dicey
• difficult
• perilous
• precarious
• risky
• uncertain
• unhealthy
• unsafe
• unsound