This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
槈 combines 木 (tree/wood) with 辱, which likely contributes the sound. The exact historical development is uncertain.
The left side is 木 (tree), and the right side is 辱. Without a clear meaning, picture a wooden tool or a tree marked with something shameful, but treat the meaning as uncertain.
For ドウ, imagine a wooden dough bowl: dough -> ドウ, and the wood 木 connects to the shape.