swing, trapeze
韆 centers on suspended swinging motion: a swing or trapeze, both involving a seat or bar that moves back and forth through the air.
韆 combines 革 (leather) with 遷 (move, shift), suggesting a leather seat that moves back and forth—a swing or trapeze. The exact historical development is uncertain, but the component combination fits the meaning.
The leather radical 革 hints at the material of the seat or straps, while 遷 (move) suggests the swinging motion. Picture a leather swing moving through the air.
For セン, imagine a centipede (セン) swinging on a tiny trapeze: cent -> セン, and the many legs grip the leather straps.
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