ひいおばあさんMeaningsNoun1. great-grandmother (Usually kana)Other spellings曾ひいおばあさん曾ひいお祖母ばあさん曽ひいお祖母ばあさんUsually written in kanaKanji in other spellings曾formerly [old]祖grandparent母mother曽great (grandparent or grandchild)