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

thlibri

noun. soup

There was a deleted noun G. thlibri “soup” in the Gnomish Lexicon of the 1910s (GL/73) based on the early root ᴱ√SḶPḶ (QL/84).

Neo-Sindarin: This early root became ᴹ√SALAP “lick up” in The Etymologies of the 1930s (Ety/SÁLAP), but I assume the existence of a variant form ᴹ√SULUP “lap up” serving as the basis for words like 1948 ᴹQ. sulpa- “to lap up” (PE22/114). As such, I would update the Gnomish word to ᴺS. solph “soup” as a cognate to [ᴱQ.] sulpa “soup” (QL/84).

Cognates