gamble: [18] Although its ancestry has never been established beyond all doubt, it seems overwhelmingly likely that gamble is essentially the same word as game (in which the sense ‘gamble’ is preserved in such contexts as gaming tables and betting and gaming). The Middle English form of game was gamen, and it is thought that this may have produced a variant form gamel (recorded in the 16th century) which in due course became gamble. => game[gamble etymology, gamble origin, 英语词源]