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-.
实用例句
1. Hearing the bell, he put down the besom quickly and opened the door.