Where does “姉分” come from?

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

姉分 (Japanese): sworn elder sister

Definitions

  1. sworn elder sister

Ancestry of “姉分”, step by step

姉分 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 姉

StepLanguageWordMeaning
1Japanese姉elder sister
Every word from Middle Chinese 糞 →Every word from Middle Chinese ふん →Every word from Japanese 分 →