countersink (plural countersinks)

  1. a cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.
  • German: Ansenkung, Senkbohrung
  • Italian: svasatura, accecatura, accecatoio, alesatura
  • Spanish: avellanado

countersink (countersinks, present participle countersinking; past countersank, past participle countersunk)

  1. (transitive) To create such a conical recess.
    to countersink a hole for a screw
  2. (transitive) To cause to sink even with or below the surface.
    to countersink a screw or bolt into woodwork

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