This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 冾 is uncertain. It combines 冫 (ice) with 合 (fit, join), but the original semantic and phonetic roles are unclear.
冾 has no clear meaning, but visually it looks like ice 冫 fitting together 合. Imagine ice cubes joining together in a drink, but remember the meaning is uncertain.
For キョウ, imagine a cold (冫) Kyoto (キョウ) where ice fits together (合) on the streets: Kyoto -> キョウ.