亡ぼう姉し

noun

one's late elder sister

Formal, often used in obituaries, memorials, or respectful reference to one's own deceased older sister.

• 亡ぼう姉しの遺い志しを継ついで、この基き金きんを設せつ立りつしました。

  I established this foundation in accordance with my late elder sister's wishes.