chisel
銶 centers on a metal tool used for cutting or shaping: a chisel.
銶 combines 金 (metal) with 求, which likely contributes the sound and may relate to the idea of seeking or shaping, but the exact historical development is uncertain.
The left side is metal 金, and the right side 求 looks like a tool with a handle and a cutting edge. Picture a metal chisel being used to carve or shape something.
For キュウ, imagine a chisel making a sharp, quick sound as it cuts: 'kyu!' The quick, high-pitched noise cues キュウ while the metal chisel does its work.