The kanji 胴胴 primarily refers to the "torso," "trunk," or "body." It signifies the part of the body between the neck and the hips, encompassing the chest, abdomen, and back. It can also refer to the main body or central part of something.

・On-yomi (音読み): ドウ ・Kun-yomi (訓読み): どう

⚫︎ 胴着（どうぎ） Translation: Keiko-gi (Judo uniform top) ⚫︎ 胴体（どうたい） Translation: Body, fuselage (of an aircraft) ⚫︎ 腹（はら）の胴《胴》（はらのどうどう） Translation: Stomach (literally "stomach's torso")

The kanji 胴胴 is a phono-semantic compound (形声文字). The radical is 月 (or sometimes 肉), which represents "flesh" or "body." The phonetic component is 同 (dōu), which provides the sound and hints at a related meaning: "same" or "together." The combination suggests the main body part, which is the same or whole. The historical development shows a simplification of the character over time. The original form might have been more detailed in representing the body.