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harm

 
/hɑrm/ n [U]

Definition

physical or other injury or damage: Missing a meal once in a while won’t do you any harm. Fortunately, she didn’t come to any harm when the car skidded. Maybe Jim can help you – there’s no harm in asking (= no one will be annoyed and you might benefit). harm
 
/hɑrm/ v [T]
The tornado blew out the windows of a nearby school, but none of the children were harmed.
harmful
 
/ˈhɑrm·fəl/ adj
This group of chemicals is known to be harmful to the environment.
(Definition of harm n from the Cambridge Academic Content Dictionary © Cambridge University Press)

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