To dig a military foxhole into, or convert into a foxhole by digging.
To drive into a military foxhole.
The burrow in the ground where a fox lives.
A small pit dug into the ground as a shelter for protection against enemy fire.
To perforate with a trephine.
To use a trephine during surgery.
A surgical instrument with a cylindrical blade used to remove a circular section of tissue, f.e. bone or cornea; a trepan.