spear, javelin, (kokuji)
鑓 centers on a thrown or thrust weapon: a spear or javelin. It is a kokuji created in Japan to represent this concept.
鑓 is a kokuji, a character created in Japan. It combines 金 (metal) with 遣, which likely contributes the sound やり, to represent a metal spear or javelin.
The left side 金 means metal, and the right side 遣 suggests dispatching or sending. Picture a metal spear being dispatched through the air toward its target.
For やり, imagine a spear-thrower named Yari who always hits the mark: Yari -> やり, and the metal spear flies straight.
—