This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 鍿 is uncertain. It visually combines 金 (metal) with a component resembling 巛 over 一 over 田, but the origin and original meaning are unclear.
Since the meaning is unclear, focus on the shape: metal 金 beside a layered field-like structure (巛 over 一 over 田).
For シ, imagine a sheet of metal (金) with the character's distinctive top shape stamped on it: sheet -> シ.
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