A portable percussive power tool that combines a hammer and chisel used to drill or break hard matter, for instance rock or concrete.
To use a jackhammer.
To break (something) using a jackhammer.
To strike (something) repeatedly with force, to pound.
To move like a jackhammer.
To beat hard, to pound.
To form (something) using a jackhammer.
To move (something) like a jackhammer.
A tool used to bore through rock when sinking shafts.
A surgical instrument used to remove a circular section of bone from the skull; a trephine.
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.
To use a trepan; to trephine.