Comment: In Tsakh. the stem is used only for the 3d/4th classes (opposed to ǯu-/ǯe-, see PL *-iž); in Lezg. and Tab. it is used for the 3d person (while the stem *-iž is used for the 1st and 2d persons). The original usage is probably the Tsakhur one.
The PL paradigm can be reconstructed as *ʔičʷ (dir. stem), *ča- (obl. stem, cf. Tab. gen. ča-n, Ag. Bursh. ič̌,če-).
