counterbore

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. A cylindrical recess, typically machined at the mouth of a hole to admit a screw (such as a cap screw) so that the screw sits flush with a surface.
  2. The cutter used to cut such a recess. (Also used, at less depth, for spotfacing.)
    — Meronyms: flute, pilot (the land at the tip, which rides the hole as a guide), shank
动词 v.
  1. To create such a cylindrical recess. transitive

词形变化

counterbores plural counterbores present,singular,third-person counterboring participle,present counterbored participle,past counterbored past

词汇关系

相关词
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-
Proto-Indo-European *bʰerH-der.
Proto-Germanic *burōną
Proto-West Germanic *borōn
Old English borian
Middle English boren
English bore
English counterbore
From counter- (“against”) + bore (“hole”).
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-
Proto-Indo-European *bʰerH-der.
Proto-Germanic *burōną
Proto-West Germanic *borōn
Old English borian
Middle English boren
English bore
English counterbore
From counter- (“against”) + bore (“hole”).
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