SADIST (Noun) AND SADISTIC (Adj.)

Meaning- person who gets pleasure especially sexual pleasure from inflicting pain on others

Mnemonic trick- sadistic contains word sad and stick. Sadistic enjoys by beating other people with a stick or by making them sad. Therefore, sadistic is used for people who gets pleasure by inflicting pain on others.

Uses-

•          The sadist treatment of the prisoner by ruthless guards.
•          I found a troubled sadistic youth.
•          The prisoners rioted against mistreatment by sadistic guards.