Countersink



verb — past tense: countersunk ; past participle: countersunk ; present participle: countersinking ;
1.
(TRANSITIVE) ខួងរាល់មាត់រន្ធ, វៀល (ឲ្យរីកប្រហោង)
ENGLISH MEANING
noun
1.
An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt.
2.
A drill or cutting tool for countersinking holes.
verb — past tense: countersunk ; past participle: countersunk ; present participle: countersinking ;
1.
(TRANSITIVE) 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.
(TRANSITIVE) To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork.