flourish
柅 centers on vigorous growth and thriving: to flourish, like a plant or tree spreading out strongly.
柅 combines 木 (tree) with 尼, which likely contributes the sound. The exact historical development is uncertain, but the tree component fits the meaning of flourishing growth.
A tree 木 beside 尼, which looks like a person resting under a roof, suggests a sheltered tree growing vigorously and flourishing.
For ジ, imagine a flourishing tree with a giant letter G carved into its trunk: G -> ジ, and the tree keeps growing strong.
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