This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 芛 is uncertain. It visually contains the grass radical 艹 and a lower component resembling 尹, but the original meaning and component relationships are unclear.
Since the meaning is unclear, picture a rare plant (艹) with an unusual shape below, like a sprout that hasn't been identified yet.
For イ, imagine a tiny sprout saying 'ee' as it peeks out of the grass: 'ee' -> イ.
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