Definition of misusing:
(v) :
(transitive) To use (something) incorrectly.
(n) :
An incorrect, improper or unlawful use of something.
(v) :
(transitive) To abuse or mistreat (something or someone).
(v) :
(transitive) To rape (a woman); later more generally, to sexually abuse (someone).
(v) :
(obsolete, transitive) To abuse verbally, to insult.