Early Quenya
telúmea
adjective. final, conclusive, end; last; extreme
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!
A word appearing as ᴱQ. telūmea “final, conclusive, end; last; extreme” in the Qenya Lexicon of the 1910s, an adjectival form of ᴱQ. telū̆me “finish, conclusion” under the early root ᴱ√TEL+U of similar meaning (QL/91).
Neo-Quenya: For purposes of Neo-Quenya, I would update this word to ᴺQ. telmëa “conclusive” based on the later word telma “conclusion”.