misuse

improper or excessive use; "alcohol abuse"; "the abuse of public funds"

apply to a wrong thing or person; apply badly or incorrectly; "The words are misapplied in this context"; "You are misapplying the name of this religious group"

change the inherent purpose or function of something; "Don't abuse the system"; "The director of the factory misused the funds intended for the health care of his workers"