Early Noldorin
faug
adjective. thirsty
fauglith
place name. Thirst
faus
noun. thirst
golbh
adjective. stinking
goluidh
adjective. stinking
golwai
adjective. stinking
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
A word appearing as ᴱN. faus “thirst” in Early Noldorin Wordlists of the 1920s, a noun form of better known faug “thirsty”.
Conceptual Development: In the Gnomish Lexicon of the 1910s Tolkien had G. luist “thirst” and variant luibri (GL/55) clearly from the early root ᴱ√LOYO (QL/56). He also had G. maig “thirst” with longer variant maiglos (GL/56), the latter appearing in ᴱN. Dor-na-Maiglos (LB/49), the earliest name for S. Dor-nu-Fauglith.
Neo-Sindarin: For purposes of Neo-Sindarin, I would adapt the Early Noldorin form as ᴺS. faus(t); compare to [N.] haust “bed” (Ety/KHAW).