white, shining
皎 centers on pure, bright whiteness: something shining and clear, like moonlight or a spotless surface.
皎 combines 白 (white) with 交, which likely contributes the sound. The character expresses bright whiteness or shining.
The left side 白 means white, and the right side 交 looks like crossed lines. Imagine crossing beams of pure white light that make everything shine brightly.
For キョウ, picture a bright white light shining on a Kyoto temple: Kyoto -> キョウ, and the temple glows with a pure, shining whiteness.
bright (esp. of the moon)