harmed v.（使）受到损害，伤害( harm的过去式和过去分词 )

I've never harmed a soul in my life.我这一生从未伤害过任何人。

harmful：adj.(尤指对健康或环境)有害的，导致损害的.The drug is to be reclassified after trials showed it to be more harmful than previously thought.

试验显示这种药比先前想象的'危害更大，要重新归类。