To beat (someone or something) with a stick.
To defeat someone soundly; to annihilate or crush.
To forcefully teach something.
To criticize harshly; to excoriate.
Carbonaceous shale; small coal; slate, dross, or rubbish in coal.
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.