1) Abuse 2) Assault 3) Ill use 4) Maltreat 5) Wrong 1) Abuse 2) Damage 3) Do by 4) Handle 5) Harm 6) Hurt 7) Ill-treat 8) Ill-use 9) Injure 10) Knock about or stir meat stew 11) Maltreat 12) Step 13) Treat 14) Treat badly 
• (v. t.) To treat amiss; to abuse.
Mis·treat' transitive verb To treat amiss; to abuse. 
[v] - treat badly
mistreat To treat someone, or something, badly or roughly.