You should not inflict any injury on others on any account.
He won't do you any harm.
Don't worry about my dog. He won't do you any harm.
Carbon dioxide sometimes harms people.
Beavers rarely inflict damage on people.
There is no need to be frightened. He won't harm you.
The dog defended his master from harm.
There's no need to be frightened of the dog; he is quite harmless.