反骨

反骨	fǎn gǔ	(physiognomy) protruding bone at the back of the head, regarded as a sign of a renegade nature
反	fǎn	contrary / in reverse / inside out or upside down / to reverse / to return / to oppose / opposite / against / anti- / to rebel / to use analogy / instead / abbr. for 反切 phonetic system
骨	gū	used in 骨碌碌 / used in 骨碌 / used in 骨朵
骨	gǔ	bone