countersink
noun
- type of conical-shaped cutter used to cut holes in materials
verb
No English definition recorded for this entry.
L331281 on Wikidata ↗Wiktionary
noun
Etymology: Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Proto-Indo-European *-teros Proto-Italic *-teros Proto-Italic *komterosder. Proto-Italic *komterād Latin contrāder. Old French contre- Anglo-Norman countre-bor. Middle English counter- English counter- English sink English countersink From counter- + sink.
- A conical recess, typically machined at the mouth of a hole to admit a screw (with a matching taper) so that the screw sits flush with a surface.
- The cutter used to cut such a recess. (Also used, at less depth, for edge-breaking/deburring.)
“Holonym: center drill (combined drill and countersink)”
verb
Etymology: Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Proto-Indo-European *-teros Proto-Italic *-teros Proto-Italic *komterosder. Proto-Italic *komterād Latin contrāder. Old French contre- Anglo-Norman countre-bor. Middle English counter- English counter- English sink English countersink From counter- + sink.
- To create such a conical recess.
“to countersink a hole for a screw”
- To cause to sink even with or below the surface.
“to countersink a screw or bolt into woodwork”
“I countersank into the locust just enough to make the nailhead flush.”