• 脳死のうし — brain death
• 脳卒中のうそっちゅう — stroke
• 頭脳ずのう — intellect / brainpower
• 小脳しょうのう — cerebellum
• 大脳だいのう — cerebrum

脳 uses the body radical ⺼ on the left (for organs/body parts). The right side supplies sound/meaning linked to the head and thought, pointing to both the brain’s physical organ and mental function.