高(こう)祖(そ)

トムの高(こう)祖(そ)母(ぼ)の母(はは)はスコットランドに住(す)んでいた。

• Tom's great-great-great grandmother lived in Scotland.

父(ちち)の父(ちち)は祖(そ)父(ふ)、祖(そ)父(ふ)の父(ちち)は曽(そう)祖(そ)父(ふ)、曽(そう)祖(そ)父(ふ)の父(ちち)は高(こう)祖(そ)父(ふ)だが、高(こう)祖(そ)父(ふ)より前(まえ)の世(せ)代(だい)の呼(こ)称(しょう)は決(き)まっていない。

• The father of a father is a grandfather, a grandfather's father is a great-grandfather, a great-grandfather's father is a great-great-grandfather, but no word has been decided upon for the generations before great-great-grandfather.