butcher: [13] Butcher comes via Anglo-Norman boucher from Old French bouchier, a derivative of boc ‘male goat’ (this was probably borrowed from a Celtic word which came ultimately from the same Indo-European base as produced English buck). The original sense of the word was thus ‘dealer in goat’s flesh’. => buck
c. 1300, from Anglo-French boucher, from Old French bochier "butcher, executioner" (12c., Modern French boucher), probably literally "slaughterer of goats," from bouc "male goat," from Frankish *bukk or some other Germanic source (see buck (n.1)) or Celtic *bukkos "he-goat." Figurative sense of "brutal murderer" is attested from 1520s. Butcher-knife attested from 18c. Related: Butcherly. Old English had flæscmangere "butcher" ('flesh-monger').