to walk
躞 centers on the act of walking or moving on foot. It is a rare character whose core idea is simply 'to walk'.
躞 combines 足 (foot) with 燮, which likely contributes the sound. The character is rare, and its detailed historical development is uncertain.
The left side 足 means foot, and the right side 燮 looks like a complex tangle of steps. Picture a foot navigating a tricky, winding path: 躞 is to walk.
For ショウ, imagine a person walking with a showy, exaggerated stride: show -> ショウ, and the foot 足 moves with flair.