This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
崣 is a rare character combining 山 (mountain) with 委. The exact historical development is uncertain.
With 山 (mountain) above 委, picture a mountain that entrusts its shape to the sky, but the meaning remains unclear.
For イ, imagine an eagle (イーグル) soaring over the mountain: eagle -> イ, tying the reading to the mountain shape.
—