pervert

a person whose behavior deviates from what is acceptable especially in sexual behavior

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

practice sophistry; change the meaning of or be vague about in order to mislead or deceive

Don't twist my words

corrupt morally or by intemperance or sensuality

debauch the young people with wine and women

Socrates was accused of corrupting young men