"instrument for boring larger holes," c. 1500, faulty separation of Middle English a nauger, from Old English nafogar "nave (of a wheel) drill," from Proto-Germanic *nabo-gaizaz (source also of Old Norse nafarr, Old Saxon nabuger, Old High German nabuger), a compound whose first element is related to nave (n.2) and whose second is identical to Old English gar "a spear, borer" (see gar). For other similar misdivisions, see adder. The same change took place in Dutch (avegaar, egger).
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