insect
蟜 is a rare kanji that simply means an insect or bug. Its meaning is narrow and concrete, referring to a small creeping creature.
蟜 combines 虫 (insect) with 喬, which likely provides the sound. The exact historical development is uncertain, but the structure is a typical phono-semantic compound.
The left side 虫 means insect, and the right side 喬 looks like a tall, arched shape. Imagine a strange insect with a high, arched back crawling along.
For キョウ, picture a giant insect in Kyoto (キョウト) crawling over the old capital. The city name Kyoto cues the reading キョウ.
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