This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 茰 is uncertain. It visually contains 艹 (grass) over 日 (sun), but its origin and original meaning are unclear.
The top 艹 suggests grass, and the bottom 日 suggests the sun. Picture grass growing under the sun, but remember that the actual meaning of this rare kanji is uncertain.
For ユ, imagine you (ユ) looking at this rare grass under the sun, unsure of its name: you -> ユ.
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