Comments:KW 28, Дыбо 5, Лексика 231-232. In Mong. the vocalism was influenced by a similar root (Mong. *bakaɣu, *bakalaɣur < *pŭ́k`a q. v.); a remnant of the original root vocalism may be seen in WMong. boɣaɣu 'crop, goitre' (coexisting with baqaɣu) - however, the latter form may as well be a Turkism < Turk. *bokak.