gong
鐃 centers on a large metal percussion instrument: a gong. The meaning is concrete and specific, without abstract extensions.
鐃 combines 金 (metal) with 堯, which likely contributes the sound. The character refers to a metal gong or similar percussion instrument.
The left side 金 means metal, and the right side 堯 looks like a tall stand with a hanging disc. Picture a large metal gong mounted on a stand, ready to be struck.
For ドウ, imagine striking the gong and hearing a deep, resonant 'doh' sound: doh -> ドウ, the sound of the metal gong.