fall down, collapse
僵 centers on a person losing upright posture and falling or collapsing, often suddenly or heavily.
僵 combines 亻 (person) with 畺, which likely contributes the sound and may relate to stiffness or boundary, suggesting a person becoming rigid and falling.
A person 亻 beside 畺 (a shape suggesting a boundary or limit) can be seen as someone pushed past their limit, collapsing to the ground.
For キョウ, imagine a person collapsing in a crowded street in Kyoto (京都, きょうと): Kyoto -> キョウ, and the person falls down.
jiangshi; Chinese hopping vampire; reanimated corpse in Chinese legends and folklore