pervert
per-vert
verb
To alter something from its original purpose or meaning, often for ill intent.
"He tried to pervert the course of justice."
noun
A person whose sexual behaviour is considered abnormal or unacceptable by society.
"He was labelled a pervert for his actions."
Thesaurus
Synonyms: convolute, twist, sophisticate, twist around, degenerate, deviate, perv, perve, deviant, misuse, abuse, debase