engrave
鋕 centers on the act of engraving, specifically carving or incising a design or writing into a hard surface, often metal.
鋕 combines the metal radical 金 with the phonetic component 志 (シ), suggesting a character related to metalwork with the sound シ. The exact historical development is uncertain, but it likely follows the standard phono-semantic pattern.
Picture a metal (金) surface being engraved with a strong will (志). The engraver's determination is etched into the metal.
For シ, imagine engraving the letter 'C' onto a metal plate: 'C' sounds like シ, and the metal (金) is being marked.