Deprave (verb)

1. To make morally bad or evil; to corrupt the morals of.
2. To make bad or worse; to deteriorate in quality.

Origin:

From latin depravare, meaning "to corrupt".

Examples:

1. The influence of bad company is said to deprave young minds.
2. The society's moral decay is depraving the youth.
3. The negative influence of the media can deprave people's minds.
4. The harsh living conditions deprave the prisoners' minds.
5. The drug addiction depraves the body and mind.