Origin: before 900; Middle English nauger (a nauger misdivided as an auger;compare adder, apron), Old English nafogār nave-piercer (cognate with Old Norse nafarr,Old Saxon nabugēr,Middle Dutch navegeer,Old High German nabagēr), equivalent to nafanave2 + gār spear; compare gore3, garlic
a hand tool with a bit shaped like a corkscrew, for boring holes in wood
2.
a larger tool of the same kind for boring holes in the ground
[C15 an augur, resulting from mistaken division of earlier a nauger, from Old English nafugār nave (of a wheel) spear (that is, tool for boring hubs of wheels), from nafunave² + gār spear; see gore²]
c.1500, faulty separation of M.E. a nauger, from O.E. nafogar "nave drill," from nafu "nave of a wheel" (see nave (2)) + gar "a spear, borer" (see gar). For similar misdivisions, see adder. The same change took place in Du. (avegaar).