pound
擣 centers on striking or beating something repeatedly with force: pounding, as with a pestle or hammer.
擣 combines 扌 (hand) with 壽, which likely contributes the sound and may relate to pounding or beating. The exact historical development is uncertain.
The hand radical 扌 beside the dense, blocky 壽 suggests a hand gripping a heavy tool and pounding down repeatedly.
For トウ, imagine pounding a toe with a hammer: toe -> トウ, and the hand 扌 delivers the painful pound.