Wiktionary
kerfing
Etymology 1 vb. (present participle of kerf English) Etymology 2
n. (context music chiefly lutherie English) A thin strip of wood kerfed to allow easy bending and then glued inside the body of a string instrument along the rim between its two abutting sides to reinforce the joint.
Usage examples of "kerfing".
He cemented a smaller, sharp-edged diamond to the end of a cleaving stick and began the laborious, time-honored process of kerfing.