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

sauth

noun. a hole, tunnel

A word in the Gnomish Lexicon of the 1910s glossed “a hole, a tunnel” derived the early root ᴱ√sab- [SAPA] (GL/67).