This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
濨 combines the water radical 氵 with 慈, which likely contributes the sound. The exact historical development and original meaning are uncertain.
Water 氵 beside 慈, a shape associated with kindness or compassion. Imagine a gentle stream that heals, but remember the meaning is unclear.
For シ, picture a compassionate person (慈) pouring water (氵) for a thirsty traveler: she -> シ, and her kindness flows like water.
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