This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
檽 combines 木 (tree) with 需, which likely contributes the sound. The exact historical development is uncertain.
The left side is a tree 木, and the right side 需 looks like rain 雨 over a structure. Picture a tree needing rain to grow, but the meaning remains uncertain.
For ジ, imagine a tree 木 that needs 需 a gentle breeze (ジ) to spread its seeds.