This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
薴 is a rare character combining the grass radical 艹 with 寧, but its exact historical development and original meaning are uncertain.
The grass radical 艹 over 寧 suggests a plant that brings peace or calm, but since no clear meaning is given, imagine a mysterious herb that soothes when you are restless.
For ドウ, picture a peaceful meadow (the grass 艹) where you hear a gentle 'doh' sound from a distant bell: doh -> ドウ, and the calm scene matches the 寧 component.