This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 葅 is uncertain. It visually combines 艹 (grass) with 俎, but the original meaning and component relationship are unclear.
The top is grass 艹, and the bottom 俎 suggests a cutting board or altar. Picture pickled vegetables being prepared on a board, but remember the meaning is uncertain.
For ショ, imagine a chef showing off a pickled dish: show -> ショ, tied to the pickling scene.