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 

sikil

noun. dagger, knife

A noun in The Etymologies of the 1930s glossed “dagger, knife” and derived from the root ᴹ√SIK (Ety/SIK).