This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 巎 is uncertain. It combines 山 (mountain) with 夒, a rare component whose origin is unclear.
With 山 on the left and a complex right side, 巎 looks like a mountain with many intricate parts, but its meaning remains obscure.
For ドウ, imagine a deep mountain echo: 'doh' (ドウ) reverberating through the peaks, even though the kanji's meaning is uncertain.
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