Qenya
fauka
adjective. thirsty, parched, (lit.) open-mouthed
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!
An adjective in The Etymologies of the 1930s glossed “open-mouthed, thirsty, parched” under the root ᴹ√PHAU̯ “gape” (Ety/PHAU).
Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. {loise >>} loire (loiri-) “thirsty” under the early root ᴱ√LOYO, along with an alternate form ᴱQ. loimea as the adjective form of ᴱQ. loime “thirst” (QL/56).
Neo-Quenya: I would retain fauca “thirsty, parched, (lit.) open-mouthed” for purposes of Neo-Quenya, but use it only for extreme thirst and dry conditions (parched), as opposed to Q. soica for more ordinary levels of “thirsty”.