An article published in Harvard Men’s Health Watch in 2012 shows heavy coffee drinkers live longer. The researchers examined data from 400,000 people and found out that men who drank six or more coffee cups per day had a 10% lower death rate.
COUNTERSUNK
COUNTERSINK
set, countersink
(verb) insert (a nail or screw below the surface, as into a countersink)
Source: WordNet® 3.1
Verb
countersunk
past participle of countersink
Adjective
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.
COUNTERSINK
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
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COVERT
(adjective) secret or hidden; not openly practiced or engaged in or shown or avowed; “covert actions by the CIA”; “covert funding for the rebels”
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