Proto-North Caucasian: *dū
Meaning: thou (obl. base)
Notes: Reconstructed for the PEC level (there are no traces of this pronoun in PWC). The root is well preserved in the Western (Av.-And.-Tsez.) area, and has almost disappeared in other languages, except Archi and Darg. dialects. It must have been originally the dative stem in the complicated suppletive paradigm of the 2d p. sing. pronoun (dir. *u_ō / *ʁwV̄, erg. *ʔoʁwV-, gen. *ʔiu_-, dat. *dū-). It has preserved its function in Darg., shifted to genitive in PL (Archi; note that Arch. dative wa-s is an obvious innovation), and became the general oblique stem in Av.-And.-Tsezian.
