counterbore

Etymology
From.

Noun

 * 1) A cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.
 * 2) The tool with which a counterbore is machined.

Translations

 * Dutch:
 * French:
 * Italian: accecatura, svasatura, accecatoio
 * Russian:, ,

Verb

 * 1)  To create such a cylindrical recess.