From Proto-Turkic *bar-, compare Kyrgyz баруу (baruu), Turkish varmak, Yakut бар (bar).
барар • (barar)
N. A. Baskakov, Toščakova N.A, editor (1947), “барар”, in Ojrotsko-Russkij Slovarʹ [Oyrot-Russian Dictionary], Moscow: M.: OGIZ, →ISBN