a bit, as for a brace.
a boring tool, similar to but larger than a gimlet, consisting of a bit rotated by a transverse handle.
a device consisting of a shaft with a broad helical flange rotating within a cylindrical casing to force bulk materials from one end to the other.
snake ( def 3a ).

before 900; Middle English nauger (a nauger misdivided as an auger; cf. adder, apron), Old English nafogār nave-piercer (cognate with Old Norse nafarr, Old Saxon nabugēr, Middle Dutch navegeer, Old High German nabagēr), equivalent to nafa nave2 + gār spear; cf. gore3, garlic

auger, augur. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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World English Dictionary
auger (ˈɔːɡə)
1.  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]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

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).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
When the drill rod is threaded, extensions can be added or auger bits interchanged.
But if you want a seasonal delicacy here now, you will need a sharp auger.
For this you'll need a few basic tools: a plunger, an auger and a few.
It does not auger-in the running-out of oil, per se.
Images for auger
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