a hole or passage made by a drill; usually made for exploratory purposes | systematic training by multiple repetitions |
diameter of a tube or gun barrel | (military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms |
a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | similar to the mandrill but smaller and less brightly colored |
a person who evokes boredom | a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) |