A word appearing in the rejected name Côf Gwaeren Bel “Windy Bay of Bel” (VT42/15), an adjectival form of gwae “wind”. Despite this rejection, I think ᴺS. gwaeren “windy” is perfectly viable for purposes of Neo-Sindarin.

Conceptual Development: A likely precursor is G. {gwavwed >> gwanwed >>} gwavwed “windy” from the Gnomish Lexicon of the 1910s, an adjectival form of G. gwâ “wind” (GL/43).