A noun meaning “wind” derived from the root ᴹ√WAW(A) (Ety/WĀ). Here the [[ilk|initial [w] became [gw]]], and after the final vowel vanished, the [[ilk|final [w] became [u]]].
Doriathrin
gwath
noun. shade
gwau
noun. wind
góda-
verb. to soil, stain
A noun glossed “shade” (shadow) derived from the root ᴹ√WATH (Ety/WATH). It is a clear example of how [[ilk|initial [w] became [gw]]] in Ilkorin, and it appears in several names: Thuringwethil “(Woman of) Secret Shadow” and Urthin Gwethion (unglossed but presumably “✱Mountains of Shadow”).