Comments:EAS 147, KW 55, Poppe 56, ОСНЯ 1, 191. Despite Doerfer MT 56, TM is hardly borrowed from Mong., and (despite TMN 2, 352) the Turk. and Mong. forms are certainly related. Cf. also Turk. *bok- 'to cross (legs), bend (knees)' (VEWT 79, EDT 311), WMong. boki- (KW 49) 'to bend', reflecting a back-row variant of the same root. Part of the Mongolian (*bög-) and TM forms seem to go back to a variant *bi̯ŭ̀ki.
