countersink

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. 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.
  2. The cutter used to cut such a recess. (Also used, at less depth, for edge-breaking/deburring.)
    — Holonym: center drill (combined drill and countersink)
动词 v.
  1. To create such a conical recess. transitive
    — to countersink a hole for a screw
  2. To cause to sink even with or below the surface. ambitransitive
    — to countersink a screw or bolt into woodwork

词形变化

countersinks plural countersinks present,singular,third-person countersinking participle,present countersank past countersunk past countersunk participle,past

词汇关系

衍生词
back-countersink countersinker
相关词
diesinking sink spotface

词源

词源 1
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.
词源 2
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.
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