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 

tulko

noun. support, prop

A noun for “support, prop” in The Etymologies of the 1930s, derived from ᴹ✶tulku under the root ᴹ√TULUK (Ety/TULUK).

Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. tulpo “buttress, prop” and ᴱQ. talpa “support, prop, base, basis, pediment (column)” under the early root ᴱ√TḶPḶ (QL/93).