Comments:A Western isogloss. Mong. beɣelej < *bejelej < *bele-lej. See EAS 109, Колесникова 1972а, 97-98, Дыбо 311, Лексика 250. Doerfer's (MT 240) attempt to refute the TM form by reconstructing *biglēn is quite artificial: forms like Ul. gileptu(n) go back to a quite separate root (see *gilu).