Комментарии:A Western isogloss. See Дыбо 7, Лексика 154. The parallel seems probable, but PT should rather have a closed *ẹ. There may have been some confusion between this root and another one, represented by PT *Tagɨ 'female kulan' (OT taɣɨ, see EDT 466; Bulg. toxǝ 'horse') and borrowed in (or corresponding to?) Mong. taki 'wild horse'.