Compare to Kyrgyz оңдоо (oŋdoo, “to correct”).
оҥдоор • (oŋdoor)
N. A. Baskakov, Toščakova N.A, editor (1947), “оҥдоор”, in Ojrotsko-Russkij Slovarʹ [Oyrot-Russian Dictionary], Moscow: M.: OGIZ, →ISBN