trunk, portfolio
匧 centers on a container for carrying items: a trunk, chest, or portfolio. The idea is a box-like object that holds things.
匧 combines the enclosure 匚 (box, container) with 夾, which likely contributes the sound and the idea of holding or gripping, suggesting a container that holds items.
The outer 匚 is a box, and inside is 夾, which looks like something being held between two sides. Picture a sturdy trunk with a portfolio tucked inside, held securely by the box.
For キョウ, imagine a trunk so big it echoes 'kyoouu' when you shout into it: kyoouu -> キョウ, the sound of a deep container.