胴 means “torso, trunk”

どう · dou

Also: hull (ship), hub of wheel

On'yomi (Chinese reading)
ドウ

JLPT N1 · Taught in secondary school · 10 strokes

The story

Flesh (月) and 同, the same all the way down: the body's long middle. 胴 is the torso, 胴体 the body of a person or a plane, 胴上げ is tossing a winner into the air, and in kendo 胴 is the armor over the belly.

Used in 胴体 (doutai, body/fuselage), 胴上げ (douage, tossing someone in celebration), and 胴回り (doumawari, waist measurement)

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