countersink
oxford
views updated Jun 08 2018coun·ter·sink / ˈkountərˌsingk/ •
v. (past and past part. -sunk / -ˌsəngk/ ) [tr.] enlarge and bevel the rim of (a drilled hole) so that a screw, nail, or bolt can be inserted flush with the surface. ∎ drive (a screw, nail, or bolt) into such a hole.
The Oxford Pocket Dictionary of Current English