Mistreats is a strong and negative verb that implies the act of abusing or treating someone unfairly. There are several synonyms that can be used in its place, such as maltreat, harm, injure, oppress, exploit, victimize, abuse, and neglect. Maltreat suggests cruel or violent behavior towards someone or something. Harm implies causing injury or damage intentionally or unintentionally. Oppress refers to the act of using authority or power to treat someone unfairly. Exploit connotes taking advantage of someone for personal benefit. Victimize implies making someone suffer unjustly. Abuse suggests cruelty or mistreatment towards someone. Neglect implies failing to provide the necessary care or attention to someone or something.