Comments:EAS 85, KW 317, Владимирцов 194. Poppe 29, 59 (Turk.-Mong.), АПиПЯЯ 15. Mong. is hardly borrowed from Turk., despite Щербак 1997, 144. *-jg- is probable because of the TM reflex and loss of *-g- in Jpn.; Korean high tone (rather untypical for a verb) is also possibly due to contraction (see also *sắjV 'shallow place' - a possible source of contamination).