Sadism (noun)

1. The tendency to derive pleasure, especially sexual pleasure, from inflicting pain, suffering, or humiliation on others.
2. The practice of such behavior.

Origin:

Derived from the name of the french writer the marquis de sade (1740-1814), who wrote novels describing sexual cruelty and violence.

Examples:

1. His sadism was evident in the way he would often hurt his partner during intercourse.
2. The Nazi regime is considered an example of sadism on a massive scale.
3. The sadistic teacher would often punish her students with cruel and unusual methods.
4. The prisoner was subjected to torture, which was a form of sadism.
5. The sadism of the bully was evident in the way he would torment the weaker kids.