From Proto-Turkic *toŋ- (“to freeze”). Cognate with Kazakh тоңу (toñu), Southern Altai тоҥор (toŋor), Azerbaijani donmaq, Turkish donmak, Shor тоң-, Uzbek to'ngmoq, etc.
тоңуу • (toŋuu) (Arabic spelling توڭۇۇ)