counterbore

[koun-ter-bawr, -bohr; koun-ter-bawr, -bohr]

coun·ter·bore

[koun-ter-bawr, -bohr; koun-ter-bawr, -bohr] noun, verb, coun·ter·bored, coun·ter·bor·ing.
noun
1.
a tool for enlarging a drilled hole for a portion of its length, as to permit sinking a screw head.
2.
the portion of the hole so enlarged.
verb (used with object)
3.
to enlarge (a drilled hole) along part of the length of the hole by drilling with a bit having a greater diameter.

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Counterbore is one of our favorite verbs.
So is peculate. Does it mean:
to spend time idly; loaf.
to steal or take dishonestly (money, esp. public funds, or property entrusted to one's care); embezzle.

Origin:
1605–15; counter- + bore1

coun·ter·bor·er, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To counterbore
WordNet
counterbore

noun
a bit for enlarging the upper part of a hole 
WordNet® 3.0, © 2006 by Princeton University.
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