hoe
錤 centers on a farming tool used for digging and breaking soil: a hoe.
錤 combines 金 (metal) with 其, which likely contributes the sound. The character refers to a metal farming tool, specifically a hoe.
The left side 金 means metal, and the right side 其 looks like a tool with a handle and a blade. Picture a metal hoe with a sturdy handle: 錤 is a hoe.
For キ, imagine a key-shaped hoe: key -> キ, and the metal key-hoe digs into the soil.