This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
庪 combines 广 (building or roof) with 技 (skill). The exact historical development is uncertain, but it likely originally referred to a structure or place related to skill or technique.
A building (广) that houses skill (技) — perhaps a workshop or studio. Without a clear meaning, imagine it as a place where techniques are practiced.
For キ, imagine a key (キー) to the workshop: the key unlocks the skill inside. Key -> キ.
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