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!

Gnomish

fadros

noun. satiety, weariness of anything

A word in the Gnomish Lexicon of the 1910s appearing as G. fadros “satiety, weariness of anything”, a noun form of G. fadra- “to sate, weary” (GL/33).

Neo-Sindarin: For purposes of Neo-Sindarin, I would update this word to ᴺS. farthas “satiety, satisfaction” based on ᴺS. fartha- “to sate” from the 1930s root ᴹ√PHAR “suffice”; this neologism doesn’t have the same negative connotation as the original Gnomish word.