This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
塨 combines 土 (earth) with 恭, which likely contributes the sound. The exact historical development is uncertain.
The left side is earth 土, and the right side is 恭 (respect). Picture respectful earth, perhaps a mound or platform built with care, though its exact meaning is unclear.
For キョウ, imagine the earth 土 showing respect 恭 to a famous Kyoto temple: Kyoto -> キョウ, and the earth itself bows.
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