枕骨

枕骨	zhěn gǔ	occipital bone (back of the skull)
枕	zhěn	(bound form) pillow / to rest one's head on (Taiwan pr. [zhen4])
骨	gū	used in 骨碌碌 / used in 骨碌 / used in 骨朵
骨	gǔ	bone