drill
noun
1.
a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)
Derived from:
drill 2.
similar to the mandrill but smaller and less brightly colored
3.
systematic training by multiple repetitions
Derived from:
drill 4.
(military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms
Derived from:
drill