虐 means “cruelty, abuse”

ぎゃく · gyaku

Also: tyrannize, oppress

Kun'yomi (Japanese reading)
しいたげる
On'yomi (Chinese reading)
ギャク

JLPT N1 · Taught in secondary school · 9 strokes

The story

A tiger (虍) over a claw raised to strike: picture the strong mauling the weak. 虐 is cruelty: 虐待 is abuse, 虐殺 a massacre, and turned on yourself it is 自虐, the self-mocking humor Japanese comedians love.

Used in 虐待 (gyakutai, abuse), 虐殺 (gyakusatsu, massacre), and 自虐 (jigyaku, self-deprecation)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.