MALTREAT
mistreat, maltreat, abuse, ill-use, step, ill-treat
(verb) treat badly; “This boss abuses his workers”; “She is always stepping on others to get ahead”
Source: WordNet® 3.1
Etymology
Verb
maltreat (third-person singular simple present maltreats, present participle maltreating, simple past and past participle maltreated)
To treat badly, to abuse. [from 18th c.]
Source: Wiktionary
Mal*treat", v. t. [imp. & p. p. Maltreated; p. pr. & vb. n.
Maltreating.] Etym: [Mal- + treat: cf. F. maltraiter.]
Definition: To treat ill; to abuse; to treat roughly.
Source: Webster’s Unabridged Dictionary 1913 Edition