pervert in WordNet English dictionary

1. 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"
   pervert  misuse  abuse 
   
2. practice sophistry; change the meaning of or be vague about in order to mislead or deceive
   "Don't twist my words"
   twist  twist around  pervert  convolute  sophisticate 
   
3. corrupt morally or by intemperance or sensuality
   "debauch the young people with wine and women"; "Socrates was accused of corrupting young men"; "Do school counselors subvert young children?"; "corrupt the morals"
   corrupt  pervert  subvert  demoralize  demoralise  debauch  debase  profane  vitiate  deprave  misdirect 
   

1. a person whose behavior deviates from what is acceptable especially in sexual behavior
   pervert  deviant  deviate  degenerate