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poleaxe [poleaxe 词源字典]: "another term for battleaxe (sense 1)", Middle English: related to Middle Dutch pol(l)aex, Middle Low German pol(l)exe (see poll, axe). The change in the first syllable was due to association with pole¹; the first element poll- may have referred to a special head of the axe or to the head of an enemy.[poleaxe etymology, poleaxe origin, 英语词源]
knop: "A knob, especially an ornamental one, for example in the stem of a wine glass", Middle English: from Middle Low German and Middle Dutch knoppe.