Qenya
tyel
noun. end
tyel-
verb. to end, cease
enyáre tar i tyel, íre anarinya qeluva
in that day beyond the end, when my Sun faileth
ten sí ye tyelma, yéva tyel ar i narqelion
for here is ending, and there will be an end and the Fading
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A word appearing as ᴹQ. tyel “end” in The Etymologies of the 1930s under the root ᴹ√KYEL “come to an end” (Ety/KYEL). Its plural form tyeldi indicates a stem form of tyeld- (EtyAC/KYEL). In The Etymologies as published in The Lost Road this plural form as incorrectly given as tyelde (LR/366), but Carl Hostetter and Patrick Wynne corrected this to tyeldi in their Addenda and Corrigenda to the Etymologies (VT45/25). The word tyel “end” also appeared a couple times in the 1930s poem Fíriel’s Song (LR/72).
Neo-Quenya: In Tolkien’s later writings, the root √KYEL seems to have been revised to √TEL; see the entry on that root for discussion. Compare also 1959-60 telma “conclusion” vs. 1930s ᴹQ. tyelma “ending”. As such, I would adapt this noun as ᴺQ. tel (teld-) “end”.