inning (n.)youdaoicibaDictYouDict[inning 词源字典]
Old English innung "a taking in, a putting in," gerundive of innian "get within, put or bring in," from inn (adv.) "in" (see in). Meaning "a team's turn in a game" first recorded 1735, usually plural in cricket, singular in baseball.[inning etymology, inning origin, 英语词源]