toad
蟾 centers on the toad, a specific amphibian often associated with folklore and the moon in East Asian culture.
蟾 is a phono-semantic compound: the left component 虫 (insect/reptile) indicates the meaning related to a creature, while the right component 詹 likely provides the sound セン. The exact historical development of the toad association is uncertain.
The left side 虫 suggests a small creature, and the right side 詹 looks like a toad's bumpy back with its complex strokes. Picture a toad with a warty, intricate pattern on its skin.
For セン, imagine a toad sitting on a sen (銭, an old coin) under the moonlight: sen -> セン, and the toad is a symbol of wealth in folklore.
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