COUNTERBORING
Verb
counterboring
present participle of counterbore
Noun
counterboring (plural counterborings)
A counterbore. (cylindrical recess)
Source: Wiktionary
COUNTERBORE
Coun"ter*bore` (-br`), n.
1. A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
2. A kind of pin drill with the cutting edge or edges normal to the axis; -- used for enlarging a hole, or for forming a flat-bottomed recess at its mouth.
Coun`ter*bore" (koun`tr-br"), v. t.
Definition: To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.
Source: Webster’s Unabridged Dictionary 1913 Edition
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1 June 2025
BACKFIRE
(verb) come back to the originator of an action with an undesired effect; “Your comments may backfire and cause you a lot of trouble”; “the political movie backlashed on the Democrats”
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