lesion (n.)youdaoicibaDictYouDict[lesion 词源字典]
early 15c., from Middle French lesion, from Latin laesionem (nominative laesio) "injury," from past participle stem of laedere "to strike, hurt, damage," of unknown origin. Originally with reference to any sort of hurt, whether physical or not.[lesion etymology, lesion origin, 英语词源]