Perversion (noun)

1. A deviation from what is considered normal or acceptable behavior, especially in sexual behavior.
2. A twisted or abnormal form or deviation from what is good or right.
3. The corruption or degradation of something that was originally good or pure.

Origin:

From latin perversio, from pervertere, from per- + vertere (to turn).

Examples:

1. Pedophilia is considered a perversion by most societies.
2. The novel explores the theme of perversion and its effects on society.
3. The perversion of the original idea into something cruel and evil was a tragedy.
4. The cult's beliefs and practices were seen as a perversion of religion.
5. The perversion of justice in the court case sparked outrage among the public.