Where does “妹分” come from?

妹分 (Japanese) comes from Japanese 分, from Middle Chinese ふん, from Middle Chinese 糞.

妹分 (Japanese): sworn younger sister

Definitions

  1. sworn younger sister

Ancestry of “妹分”, step by step

妹分 traces back through two separate lines of ancestry.

via Japanese 分

StepLanguageWordMeaning
1Japanese分a minute; a part, a share, a portion; an obsolete...
2Middle Chineseふん—
3Middle Chinese糞—

via Japanese 妹

StepLanguageWordMeaning
1Japanese妹a close female companion; one's own younger...
2Japanese人a person, human; an individual; mankind, people
3Proto-Japonic*pitəone
Every word from Middle Chinese 糞 →Every word from Middle Chinese ふん →Every word from Japanese 分 →