Proto-Lezghian: *rɨqʷ / *ʔɨrqʷ (~ u)
Meaning: 1 hole, burrow 2 cave, cavern
Tabasaran: urq 1
Rutul: raχan 1
Tsakhur: wuqna 2
Comment: The Rut. and Tsakh. forms have a *-nV-suffix (which can either reflect the former oblique stem, or - through metathesis - the original root resonant).