indiscretion (n.)youdaoicibaDictYouDict[indiscretion 词源字典]
mid-14c., "want of discretion," from Old French indiscrécion "foolishness, imprudence" (12c.), from Late Latin indiscretionem (nominative indiscretio) "lack of discernment," from in- (see in- (1)) + discretionem (see discretion). Meaning "indiscreet act" is from c. 1600.[indiscretion etymology, indiscretion origin, 英语词源]