high, lofty, precipitous
崴 centers on extreme verticality: being high, lofty, or steeply precipitous like a towering mountain.
崴 combines 山 (mountain) with 威, which likely contributes the sound and reinforces the idea of imposing height or steepness.
A mountain 山 towering over a majestic, imposing form 威: the peak is high, lofty, and precipitous.
For ワイ, imagine a high mountain peak shaped like the letter Y: Y -> ワイ, and the steep slopes form the arms of the Y.
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