Answer: kerfing

AnswerCrossword Clue
kerfingto make a kerf or kerfs in (a piece of wood, a coal seam, etc.)
kerfingdeep cut a few inches high, used to undermine a portion of a coal or mineral seam
kerfingcut or incision made by a saw or the like in a piece of wood
kerfingKERF, to make an incision with a cutting tool, also CARVE, KERVE
kerfingthe act of cutting or carving