push
捘 centers on the physical action of pushing, pressing, or shoving something forward with the hand.
捘 combines the hand radical 扌 with the phonetic component 夋, suggesting a hand action related to pushing. The exact historical development is uncertain.
The hand radical 扌 beside 夋 looks like a hand pressing against something solid. Imagine pushing a heavy object with your hand.
For ソン, imagine pushing your son on a swing: son -> ソン, and your hand pushes him forward.