The word 钥匙 (yàoshi, key) is formed by combining two characters, each contributing a distinct visual and conceptual element to create the modern meaning. The first character, 钥, historically derived from a pictograph representing a metal device or bolt, evokes the locking mechanism itself. The second character, 匙, originally meaning "spoon", is used here not for its literal meaning but for its suggestive shape, reminiscent of the bit or blade of a traditional key that inserts and turns. Together, they fuse the idea of the lock (钥) with the instrumental, spoon-like tool (匙) that operates it, forming a single concept for the object that opens a lock.