turn over when asleep

夗 is composed of 夕 (moon, night) and a variant of 卩 (kneeling person). 夕 signifies night, while 卩 depicts a person bending or curling the body. Thus, 夗 conveys the image of a person curling up to sleep at night. Nowadays, 夗 is rarely used independently and only serves as a component in other characters.