Sadistically

The spiteful roommate sadistically hid their other roommate's belongings.

The hazing rituals in the fraternity were sadistically brutal.

The movie villain took pleasure in torturing his victims sadistically.

The bully sadistically mocked and humiliated his classmates.

The dictator sadistically punished those who dared to oppose him.

The hazing rituals at the fraternity were sadistically brutal, causing physical and emotional harm to the new members.

The warden of the prison was known for his sadistically cruel treatment of the inmates.

The dog fighter would sadistically make his dogs fight until one was injured or dead.

The kidnapper sadistically tormented his victim before letting her go.

The abusive husband would sadistically beat his wife.

The online troll enjoyed sadistically insulting and harassing people.

The serial killer enjoyed killing his victims sadistically.