hazardous
/ˈhæz.ər.dəs/
adjective
-
Dangerous and likely to cause harm, especially to health, safety, or the environment.
B2often before a noun; commonly used with “to” + nounformal or technical
- "The sign says the area is hazardous."A2
- "The road is hazardous when it is icy."A2
- "Workers must wear protective clothing when handling hazardous chemicals."B1
- "Hazardous waste must be disposed of according to strict regulations."C1
Common mistakes
- hazardous for health→hazardous to health
Use “hazardous to” before the thing that may be harmed.
- hazardous for the environment→hazardous to the environment
The standard pattern is “hazardous to the environment.”