筋骨

筋骨	jīn gǔ	muscles and bones / physique / strength / courage
筋	jīn	muscle / tendon / veins visible under the skin / sth resembling tendons or veins (e.g. fiber in a vegetable)
骨	gū	used in 骨碌碌 / used in 骨碌
骨	gǔ	bone