renege (v.)youdaoicibaDictYouDict[renege 词源字典]
1540s, "deny, renounce, abandon," from Medieval Latin renegare, from Latin re-, here probably an intensive prefix, + negare "deny" (see deny). Meaning "change one's mind" is from 1784. Related: Reneged; reneging.[renege etymology, renege origin, 英语词源]