countersink

Noun
  1. A hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface (synset 103122702)
    is a type of: hole - an opening deliberately made in or through something
  2. A bit for enlarging the upper part of a hole (synset 103122293)
    is a type of: bit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press
    same as: counterbore, countersink bit
Verb
  1. Insert (a nail or screw below the surface, as into a countersink) (synset 201533061)
    is a type of: bury, sink - embed deeply
    same as: set

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