av

water, liquid

-ava tirî = grape juice;
-we bîstanê xwe av da = you have watered your garden;

From Avestan
-avô-hvarenanãmca [avô-hvarena] = a drinking fountain; a water spring;

Modern Kurdish
-ava [ve]xwarinê [=avô-hvarena] = drinking water;

From Avestan ap-, ape-, -apō,

Skt. ap-,
Lith. upe,
Latv. upe “water”
Lat. amnis “river”,
Old Irish abann = “river”,
Welsh afon “river”.