set, countersink
(verb) insert (a nail or screw below the surface, as into a countersink)
Source: WordNet® 3.1
countersunk
past participle of countersink
countersunk (not comparable)
(of a bolt or screw) That has a flat conical top allowing it to be inserted flush with a surface
Source: Wiktionary
Coun"ter*sunk` (-snk`), p. p. & a. from Countersink.
1. Chamfered at the top; -- said of a hole.
2. Sunk into a chamfer; as, a countersunk bolt.
3. Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead.
Coun"ter*sink` (koun"tr-sk`; 277), v. t. [imp. & p. p. Countersunk (- s; p. pr. & vb. n. Countersinking.]
1. To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw.
2. To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork.
Coun"ter*sink`, n.
1. An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt.
Note: In the United States a flaring cavity formed by chamfering the edges of a round hole is called a countersink, while a cylindrical flat-bottomed enlargement of the mouth of the hole is usually called a conterbore.
2. A drill or cutting tool for countersinking holes.
Source: Webster’s Unabridged Dictionary 1913 Edition
9 May 2025
(noun) anything in accord with principles of justice; “he feels he is in the right”; “the rightfulness of his claim”
According to Guinness World Records, on 25 September 2016, the Birla Institute of Management Technology (India) in Uttar Pradesh, India, constructed the largest coffee cups pyramid consisting of 23,821 cups. They used paper takeaway coffee cups to build the pyramid.
