lofty, towering
嶔 centers on a mountain's imposing height: something lofty, towering, or steeply elevated.
嶔 combines 山 (mountain) with 欽, which likely contributes the sound and may carry a sense of awe or elevation. The exact historical development is uncertain.
A mountain 山 with a towering, awe-inspiring shape 欽: imagine a peak so high it inspires reverence, like a lofty, towering summit.
For キン, picture a king standing on top of the towering mountain: king -> キン, and the king surveys his lofty domain.