bore 1 
(bôr)
(bôr)v. bored, bor·ing, bores
v.tr.
1. To make a hole in or through, with or as if with a drill.
2. To form (a tunnel, for example) by drilling, digging, or burrowing.
v.intr.
1. To make a hole in or through something with or as if with a drill: "three types of protein that enable the cells to bore in and out of blood vessels" (Elisabeth Rosenthal).
2. To proceed or advance steadily or laboriously: a destroyer boring through heavy seas.
n.
1. A hole or passage made by or as if by use of a drill.
2. A hollow, usually cylindrical chamber or barrel, as of a firearm.
3. The interior diameter of a hole, tube, or cylinder.
4. The caliber of a firearm.
5. A drilling tool.
[Middle English boren, from Old English borian.]