jester (n.)youdaoicibaDictYouDict[jester 词源字典]
mid-14c., jestour (Anglo-Latin), late 14c., gestour "a minstrel, professional reciter of romances," agent noun from gesten "recite a tale," which was a jester's original function (see jest). Sense of "buffoon in a prince's court" is from c. 1500.[jester etymology, jester origin, 英语词源]