This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
劯 combines 石 (stone) and 力 (strength), but its exact historical development is uncertain. It may have originally expressed strength related to stone, but this is speculative.
The left side is stone 石 and the right side is strength 力. Picture a stone so heavy that only great strength can move it.
For ショ, imagine a strong person showing off by lifting a huge stone: show -> ショ, and the stone requires strength.