poleax (n.)youdaoicibaDictYouDict[poleax 词源字典]
kind of axe used as a weapon or by butchers, c. 1300, pollax, from pol "head" (see poll (n.)) + ax (n.). From notion of beheading or head-splitting, or perhaps from the shape of the ax. Spelling altered 17c. by confusion with pole (n.1)).[poleax etymology, poleax origin, 英语词源]