(ˈ)mi|shü..., (ˈ)mis|yü... — see usage noun
Etymology: Middle French mesusage, from mes- mis- (I) + usage — more at usage
1. : bad treatment : abuse
charged misusage of patients by one of the attendants
2. : wrong or improper use (as of words)
an instance of what he regarded as misusage appeared in a conservative publication — Kathryn A. McEuen