[I, Ipr, Tn, Tn.pr] make (a hole, well, tunnel, etc) with a revolving tool or by digging 挖, 掘, 钻, 开凿（洞﹑ 井﹑ 隧道等）: This drill can bore through rock. 这台钻机能钻透岩石. * bore a hole in wood 在木头上钻个洞 * bore a tunnel through a mountain 开凿穿山隧道. 
[Ipr, Ip, Tn.pr, Tn.p] move by burrowing 掘进: The mole bored (its way) underground. 鼹鼠在地下挖掘（路）.> bore n
1 (also `borehole) deep hole made in the ground (esp to find water or oil) 打进地下的深洞（尤指为寻找水或石油的）; 井眼.
2 (esp in compounds 尤用以构成复合词) (diameter of the) hollow part inside a gun barrel 枪膛, 炮膛（的口径）: a twelve-bore shotgun 十二口径滑膛枪 * small-bore guns 小口径枪.