曽そう祖そ父ふ母ぼMeaningsNoun1. great-grandparentsKanji used曽great (grandparent or grandchild)祖grandparent父father母motherPitch accentそうそふぼComposed of曽そうgreat (i.e. great-grandson, great-grandmother)Prefix祖そ父ふ母ぼgrandparentsNoun