This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 歫 is uncertain. It visually combines 止 and 巨, but the original semantic and phonetic roles are unclear.
With no clear meaning, focus on the shape: 止 (stop) beside 巨 (giant). Picture a giant stopping something, but treat the meaning as uncertain.
For キョ, imagine a giant (巨) stopping (止) with a loud 'kyo' sound: kyo -> キョ.