strong, brave, sandals, shoes
蹻 centers on strength and boldness, with an extended sense of footwear (sandals or shoes) that may relate to sturdy stepping or a brave stride.
蹻 combines 足 (foot) with 喬, which likely contributes the sound and may suggest a raised or strong foot action. The exact historical development is uncertain.
The left side 足 means foot, and the right side 喬 looks tall and strong. Imagine a brave warrior with powerful feet, stepping forward in sturdy sandals.
For キョウ, picture a strong, brave person in Kyoto (キョウト) wearing traditional sandals: Kyoto -> キョウ.