Drawbore /(?)/

Draw·bore

Drawbore

n.
  1. A hole bored through a tenon nearer to the shoulder than the holes through the cheeks are to the edge or abutment against which the shoulder is to rest, so that a pin or bolt, when driven into it, will draw these parts together. (Joinery)

Drawbore

v. t.
  1. To make a drawbore in; as, to drawbore a tenon.
  2. To enlarge the bore of a gun barrel by drawing, instead of thrusting, a revolving tool through it.