What is the X in X-mas?
1580s, agent noun from engrave.
late 15c. (implied in ingraved), from en- (1) + obsolete verb grave "carve" (see grave (v.)). Related: Engraved; engraving.
Heb. harash (Ex. 35:35; 38:23) means properly an artificer in wood, stone, or metal. The chief business of the engraver was cutting names or devices on rings and seals and signets (Ex. 28:11, 21, 36; Gen. 38:18).