Countersink

Origin

from counter + sink

Full definition of countersink

Noun

1. a conical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.

Verb

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