This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
蚷 combines 虫 (insect) with 巨, which likely contributes the sound. The exact historical development is uncertain, and the character is rare.
The insect radical 虫 suggests a bug, and the right side 巨 looks like a giant shape. Imagine a giant insect, but remember its meaning is uncertain.
For キョ, picture a giant insect making a loud 'kyo' sound as it moves: kyo -> キョ.