carve
鋟 centers on carving or incising, typically into metal or a hard surface. The given meaning is narrow, so treat it as a specific action of engraving.
鋟 is a phono-semantic compound: 金 (metal) suggests carving into metal, while the right side (⿱冖⿰又ヨ) likely contributes the sound. The exact historical development of the right-side component is uncertain.
The left side is 金 (metal). The right side looks like a roof 冖 over a hand 又 holding something like a chisel ヨ. Imagine using a metal tool to carve into a surface under a shelter.
For セン, picture carving a sen (銭, a small coin) with intricate designs: sen -> セン, and the metal 金 tool engraves the coin.