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!

Qenya 

rangwe

noun. fathom

A noun for a “fathom” in The Etymologies of the 1930s derived from primitive ᴹ✶rakmē under the root ᴹ√RAK “stretch out, reach” (Ety/RAK). It is unclear whether this was an English fathom (6 feet) or some Middle Earth measure of similar length.