hazardous
Definitions
Involving risk or danger; perilous.
Exposed to or involving the risk of harm or loss.
Examples
The chemical spill created a hazardous environment for the local wildlife.
Driving on the icy roads during the blizzard proved to be extremely hazardous.
Workers must wear protective gear when handling hazardous materials in the laboratory.
Synonyms
dangerous perilous risky precarious unsafe treacherous harmful