gold
釛 centers on gold as a metal or material. The meaning is straightforward and does not branch into abstract extensions.
釛 combines the metal radical 金 with 力, but the exact historical origin is uncertain. It may be a phono-semantic compound where 力 hints at the sound, but this is not well established.
The left side is 金 (metal, gold), and the right side is 力 (power). Imagine gold as a powerful, precious metal that stands out among others.
For コク, picture a solid block of gold shaped like a cube: cube -> コク, and the gold block is heavy and valuable.