This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
岢 combines 山 (mountain) with 可, but the exact historical development and original meaning are uncertain.
A mountain 山 with 可 beneath it, but the meaning is unclear. Imagine a mysterious mountain whose name has been lost.
For カ, picture a car driving up the mysterious mountain: car -> カ, and the car climbs the unknown 岢.
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