perversion

The action of perverting someone or something; humiliation; debasement.

The state of being perverted; depravity; vice.

Distortion or corruption of the original course, meaning, or state of something.

After all, the great error in human judgment is not so much wilful perversion, as that we judge according to situation, and always make that situation our own; while the chances are, that we really have not one thought, feeling, or habit, in common with those on whom we yet think ourselves qualified to decide.

A sexual practice considered abnormal; sexual deviance.

Tendril perversion.