trap catch animals, snare, seize
擭 centers on capturing or seizing something, especially with a device: trapping animals, snaring, or grabbing hold of something.
擭 combines 扌 (hand) with 蒦, which likely contributes the sound and is associated with capturing or measuring. The exact historical development is uncertain.
The hand radical 扌 beside 蒦 suggests a hand setting a trap or snare. Picture a hand pulling a rope to close a trap and seize an animal.
For キョ, imagine a hand seizing a key to unlock a trap: key -> キョ, and the hand grabs the key to spring the snare.