Notes: Reconstructed for the PEC level. Seems both semantically ("good" - "right" is a common correlation) and phonetically reliable. Cf. also Urart. gunǝ 'right (not left), true' (see Diakonoff-Starostin 1986, 32).
The same root is probably represented in PEC *k_wVnV 'a conditional particle' > Ud. -gin, Khin. -k:ʷa, Lak. -kun, Tsez. -kin et al.