From Proto-Turkic *sebin- (“to rejoice, be glad”).
сӱӱн- • (süün-)
Čumakajev A. E., editor (2018), “сӱӱн-”, in Altajsko-russkij slovarʹ [Altaic–Russian Dictionary], Gorno-Altaysk: NII altaistiki im. S.S. Surazakova, →ISBN