vole: [19] A vole is etymologically a ‘fieldmouse’. The word is short for an earlier volemouse, which is assumed to have been borrowed from an unrecorded Norwegian compound *vollmus. The first element of this, voll ‘field’, was descended from Old Norse völlr ‘field’, which in turn went back to prehistoric Germanic *walthus (source also of English weald [OE] and wold [OE] and German wald ‘forest’). It may be related ultimately to wild. The second element, mus, is the same word as English mouse. => weald, wold[vole etymology, vole origin, 英语词源]