• 胴体どうたい — torso / body trunk
• 胴どう着ぎ — padded body protector (kendo / martial arts)
• 胴元どうもと — the house / organizer / banker (in gambling)
• 胴回どうまわり — waist measurement
• 胴上どうあげ — tossing someone in the air in celebration

胴 combines the body radical 月（にくづき）with the sound element ドウ, meaning the main part of the body. It refers to the torso — the central mass excluding the head and limbs. This sense appears in words like 胴体 (torso), 胴着 (protective gear in martial arts), and 胴元 (the person running a game or event).