harmful
harmful
adjective
OPAL W
/ˈhɑːmfl/
(rather formal)
​causing damage or injury to somebody/something, especially to a person’s health or to the environment
the harmful effects of alcohol
harmful substances/chemicals/bacteria
the sun’s harmful ultra-violet rays
Many household products are potentially harmful.
harmful to somebody/something Exercising in polluted air is harmful to your health.
Fruit juices can be harmful to children's teeth.
Collocations
verbs
be
prove
become
adverb
extremely
very
particularly
preposition
to