fisticuffs (n.)youdaoicibaDictYouDict[fisticuffs 词源字典]
c. 1600, fisty cuffes, from fist (n.) + cuff (n.) "a blow" (see cuff (v.2)), with the form perhaps in imitation of handiwork. Related: Fisticuff.[fisticuffs etymology, fisticuffs origin, 英语词源]