trepan -
a drill for cutting circular holes around a center
drill (military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms
Verb
trepan -
cut a hole with a trepan, as in surgery
bore,
drill make a hole, especially with a pointed power or hand tool; "don't drill here, there's a gas pipe"; "drill a hole into the wall"; "drill for oil"; "carpenter bees are boring holes into the wall"
trepan -
To create a large hole by making a narrow groove outlining the shape of the hole and then removing the plug of material remaining by less expensive means.
