娣

• Younger sister.
• Secondary wife or co-wife; specifically refers to the practice of taking the younger sisters of a primary wife as additional spouses.

Functions as a noun of kinship or rank.

Used in strict contrast with 姊 (elder sister) to establish sibling hierarchy.

Fanqie reading: 徒禮.

The glyph denotes relative position rather than absolute identity. In contexts involving high-ranking households or courtly structures, it may function as a designation of rank (a junior female member of the household) rather than a biological relation.