The Collaborative International Dictionary
Countersink \Coun"ter*sink`\ (koun"t[~e]r*s[i^][ng]k`; 277), v. t. [imp. & p. p. Countersunk (-s[u^][ng]k`); p. pr. & vb. n. Countersinking.]
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.
To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork.
Wiktionary
vb. (present participle of countersink English)
Usage examples of "countersinking".
The mark they thus leave on the whale, may best be likened to the hollow made by a carpenter in countersinking for a screw.
The mark they thus leave on the whale may best be likened to the hollow made by a carpenter in countersinking for a screw.