perversion

noun
1
behaviour that is thought to be strange and not acceptable, especially when it is connected with sex; an example of this type of behaviour
انحراف, کج‌روی, کژروی, انحراف جنسی, ناهنجاری
2
the act of changing something that is good or right into something that is bad or wrong; the result of this
انحراف, تحریف
the perversion of justice
Her account was a perversion of the truth.