The Collaborative International Dictionary of English v.0.48:
Mistreat \Mis*treat"\, v. t. To treat amiss; to abuse. [1913 Webster]WordNet (r) 3.0 (2006):
mistreat v 1: treat badly; "This boss abuses his workers"; "She is always stepping on others to get ahead" [syn: mistreat, maltreat, abuse, ill-use, step, ill-treat]