異い父ふ姉し妹まい

noun

half-sister (different father); half-sisters (different father)

Refers specifically to sisters who share the same mother but have different fathers. The term is neutral and factual, used in family or legal contexts.

• 彼かの女じょは私わたしの異い父ふ姉し妹まいです。

  She is my half-sister (different father).

• 異い父ふ姉し妹まいが二人ふたりいます。

  I have two half-sisters (different father).