/ ˈseɪdɪzəm; NAmE / noun [ U ]
1.
enjoyment from watching or making sb suffer :
There's a streak of sadism in his nature.
2.
a need to hurt sb in order to get sexual pleasure
—compare masochism
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WORD ORIGIN
late 19th cent.: from French sadisme , from the name of the Marquis de Sade (1710-1814), the French writer and soldier.