backgammonyoudaoicibaDictYouDict[backgammon 词源字典]
backgammon: [17] Backgammon appears to mean literally ‘back game’, although the reason for the name is far from clear (gammon had been used since at least the early 18th century for a particular type of victory in the game, but it is hard to say whether the term for the victory came from the term for the game, or vice versa). Either way, gammon represents Old English gamen, the ancestor of modern English game. The game backgammon goes back far further than the 17th century, of course, but before that it was called tables in English.
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backgammon (n.)youdaoicibaDictYouDict
1640s, baggammon, the second element from Middle English gamen, ancestor of game; the first element apparently because pieces sometimes are forced to go "back." Known 13c.-17c. as tables.