heir, succeed
嗣 centers on continuing a family line or role: an heir who succeeds to a position, inheritance, or legacy.
嗣 combines 口 (mouth) and 冊 (book/document) with 司 (to administer), suggesting the formal declaration or record of succession. The exact historical development is uncertain, but the character is associated with inheritance and continuation.
The right side 司 looks like an official overseeing something, and the left side suggests a document or record. Picture an official reading a will that names the heir who will succeed to the family estate.
For シ, imagine the heir receiving a sheet of paper that officially names them as successor: sheet -> シ, and the document confirms their new role.
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succession; successor
your heir; his heir
heir
succeeding to a business
imperial throne
legitimate heir
heir; successor
imperial throne
Crown Prince (of Japan)
Imperial heir; Crown Prince
successor; heir; heiress
entail (in Western common law); fee tail
adoptive heir