hazardous
/ˈhæzəɹdəs/adjective
Dangerous, especially to people's health or safety.
Example sentences
- “Workers must wear masks when handling hazardous chemicals.”
- “Icy roads made the drive home hazardous.”
- “Old batteries count as hazardous waste and need special disposal.”
Common in official and safety language: hazardous materials, hazardous waste, hazardous conditions. In casual talk, 'dangerous' is the plainer word.