sadism

The deriving of sexual gratification or the tendency to derive sexual gratification from inflicting pain or emotional abuse on others.

The deriving of pleasure, or the tendency to derive pleasure, from cruelty.

Extreme cruelty.

A form of sexual perversion marked by extreme cruelty.

the enjoyment of inflicting pain without pity

achievement of sexual gratification by inflicting pain on others

gaining sexual excitement and satisfaction by watching pain inflicted by others on their victims

a morbid form of enjoyment achieved by acting cruelly to another, or others

Deliberate cruelty, either mental or physical; also refers to cruelty inflicted upon animals, regardless of gratification

sexual pleasure obtained by inflicting harm (physical or psychological) on others