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

suith

noun. drink, draught

suithlas

noun. tea

A noun appearing as G. suithlas “tea” in the Gnomish Lexicon of the 1910s, a combination of G. suith “drink” and G. lass “leaf” (GL/68).

Neo-Sindarin: The first element of this Gnomish word was derived from the early root ᴱ√SOKO “drink”, and there signs that the root √SOK survived as late as 1960 (VT39/11). As such, I’d retain ᴺS. suithlas “tea, (lit.) drink-leaf” for purposes of Neo-Sindarin. However Steve/Ríon proposed a neologism ᴺS. yllas “tea” in the Vinyë Lambengolmor Discord Server (VLDS) on 2018-11-18, based on the assumption that √YUL “drink” replaced √SOK.

suithli

noun. towel

A noun appearing as G. suithli “a towel” in the Gnomish Lexicon of the 1910s, related to G. suitha- “to dry, wipe” and G. suib “dry” (GL/68).

Neo-Sindarin: Since N. parch is a later word meaning “dry”, I think it is worth positing a neologism ᴺS. parchol “towel” for purposes of Neo-Sindarin to replace G. suithli.

suitha-

verb. to dry, wipe