姉し妹まい語ご

noun

sister language; cognate language

Linguistics term for a language that shares a common ancestor with another, i.e., a cognate language.

• 日本にほん語ごと韓かん国こく語ごは姉し妹まい語ごである可か能のう性せいが議ぎ論ろんされている。

  The possibility that Japanese and Korean are sister languages is debated.