1) Abase 2) Abuse 3) Harm 4) Hound 5) Illtreat 6) Ill use 7) Mistreat 1) Abuse 2) Do an injustice to 3) Do by 4) Handle 5) Handle roughly 6) Ill-treat 7) Ill-use 8) Mistreat 9) Step 10) To treat badly, to abuse 11) Treat 12) Treat badly 
• (v. t.) To treat ill; to abuse; to treat roughly.
Mal·treat' transitive verb [ imperfect & past participle Maltreated ; present participle & verbal noun Maltreating .] [ Mal- + treat : confer French maltraiter .] To treat ill; to abuse; to treat roughly. 
maltreat To abuse, ill-use; to handle roughly or rudely; to ill-treat.