I. ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: draw (I) + bore
: a bore for a mortise pin placed so as to draw the tenon and thus make the joint tighter
II. transitive verb
1. : to make a drawbore in (as a tenon)
2. : to enlarge the bore of (a tube, as a gun barrel) by drawing through with the working tool instead of thrusting