Comments: PTsKh *miže / *mižo; PGB *miže. To judge from the Inkh. evidence, originally the stem *miž(:)e was used as ergative (Inkh. miže), and the stem *miž(:)ɔ - as nominative (Inkh. mižo).
The initial labial in PTs *miž(:)e is hard to separate from PA *b- in *biš:-di-, Av. m- in muž 'you'. This means, that the original oblique (genitive) base *-iźwV- (with the class prefixes *w- or *u_-) changed its function to direct as early as in Proto-Avaro-Ando-Tsezian. See below for more details.