From Longman Dictionary of Contemporary Englishmistreatmis‧treat /ˌmɪsˈtriːt/ verb [transitive] to treat a person or animal badly, especially in a cruel way SYN ill-treat, maltreat Security forces are accused of mistreating prisoners. —mistreatment noun [uncountable]→ See Verb table
Examples from the Corpus
mistreat• The dangers of the Naples street-life did not bother her; she believed that no one would mistreat her.• She won't have anything to do with the boy and my husband has said she used to mistreat him.• They mistreat those in a lower rank, pressure us unnecessarily hinting that they will sue us or call on our superiors. 