COMMENT: The correspondences are regular (note, however, a usual delabialisation in PWC after the initial labial: *bŏlćwĭ > *bŏnčĭ > *mVč́V). The root originally denoted a species of wild millet (used for making brooms), cf. the meanings in PTs and PD. Note that Darg. Ak., Ur. muči 'millet' (and other dialectal forms) must be regarded as an old Avarism.
