曽そう祖そ父ふ母ぼそうそふぼMeanings1noungreat-grandparentsRefers to the parents of one's grandparents. A straightforward kinship term.私わたしの曽そう祖そ父ふ母ぼは明めい治じ時じ代だいに生うまれました。My great-grandparents were born in the Meiji era.
