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counterbore

[ koun-ter-bawr, -bohr; koun-ter-bawr, -bohr ]
/ 藞ka蕣n t蓹r藢b蓴r, -藢bo蕣r; 藞ka蕣n t蓹r藞b蓴r, -藞bo蕣r /
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noun
a tool for enlarging a drilled hole for a portion of its length, as to permit sinking a screw head.
the portion of the hole so enlarged.
verb (used with object), coun路ter路bored, coun路ter路bor路ing.
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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Origin of counterbore

First recorded in 1605鈥15; counter- + bore2

OTHER WORDS FROM counterbore

coun路ter路bor路er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2021

How to use counterbore in a sentence

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