胴
どう · dou · JLPT N1 · noun
body
🌳 Radical 月 (flesh, body part) + 同 (sound dou) = the body's trunk
月 is the flesh/body-part radical, so the character relates to the body. 同 supplies the sound dou. The meaning is the torso, the body without head and limbs, or a vehicle's frame.