hesitate, go around
佪 centers on wavering movement: hesitating in place or going around in circles rather than moving directly forward.
佪 combines 亻 (person) with 回 (turn, revolve), suggesting a person turning around or hesitating. The exact historical development is uncertain, but the component relationship is clear.
A person 亻 caught in a loop 回, going around in circles and unable to decide which way to go.
For カイ, picture a person hesitating at a crossroads, going around in circles like a kite (カイ) looping in the sky: kite -> カイ.