Comments:АПиПЯЯ 288, ОСНЯ 1, 327 (with literature; Illich-Svitych also compares Mong. qoli- 'to mix', but does not list the Turkic and Japanese forms). Cf. also Mong. kölbe- 'to lie on one side' (KW 238), qolbir- `to slip sidewards'. The attribution of some forms is problematic: Turk. *Kul- may reflect a partial contamination with PA *gi̯ŭldo 'to stretch' (q. v.).; the Jpn. and Kor. forms, due to the merger of *r and *l, can actually also reflect PA *ki̯ṓr[i] q. v.; in Jpn. cf. also koro 'round log', korog- 'to roll, rotate'. Note that the MKor. form with -w-, -'- makes the affiliation of the Korean root questionable - unless it is a dissimilative development < *kurb-ɨr-, in which case it would be a morphological structure *k`úlo-bV- = PJ *kǝ́rǝ́mp-, Mong. kölbe-, qolbir-.