wager (n.)youdaoicibaDictYouDict[wager 词源字典]
c. 1300, wajour "a promise, a vow, something pledged or sworn to;" also "a bet, a wager; stakes, something laid down as a bet," from Anglo-French wageure, Old North French wagiere (Old French gagiere, Modern French gageure) "pledge, security," from wagier "to pledge" (see wage (n.)).[wager etymology, wager origin, 英语词源]
wager (v.)youdaoicibaDictYouDict
c. 1600 (intransitive); 1610s (transitive), from wager (n.). Related: Wagered; wagering.