besom (n.)youdaoicibaDictYouDict[besom 词源字典]
Old English besma "bundle of twigs" (used as a broom or a flail), from West Germanic *besmon (cognates: Old Frisian besma, Old Saxon besmo, Old High German besmo, German Besen, Dutch bezem), which is of unknown origin. Perhaps "something bound or twisted," from PIE *bheidh-.[besom etymology, besom origin, 英语词源]