This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
廒 combines 广 (building) with 敖, which likely contributes the sound. The exact historical development is uncertain.
The building enclosure 广 wraps around 敖, a shape associated with pride or loftiness. Picture a grand storehouse or granary, though the exact meaning is unclear.
For ゴウ, imagine a grand building with a gong inside: gong -> ゴウ, and the sound echoes through the structure.
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