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 

nauta

adjective. bound, obliged

An adjective for “bound, obliged” in The Etymologies of the 1930s based on the root ᴹ√NUT “tie, bind” (Ety/NUT).

nauko

noun. dwarf