This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 匓 is uncertain. It appears to be a rare character with an enclosure 勹 and a complex inner structure, but its origin and original meaning are unclear.
Since the meaning is uncertain, focus on the shape: 勹 wraps around a dense inner cluster of strokes, like a package containing something unknown.
For キョウ, imagine a mysterious package labeled with a big 'KYO' stamp, and you have no idea what's inside: KYO -> キョウ.