Early Quenya
nyelet
noun. nail (of the finger)
takse
noun. nail
tas
noun. nail
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!
ᴱQ. nyelet “nail (of the finger)” appeared in the English-Qenya Dictionary of the 1920s with a plural form nyeleksi (PE15/75). It was probably related to ᴱQ. nyelekka “onyx” from the same document (PE15/76).
Neo-Quenya: I’d retain the word ᴺQ. nyelet “finger nail” for purposes of Neo-Quenya derived from a Neo-Root ᴺ√NYELEK, but I would assume that its stem form is nyelec- because (a) I think the plural nyeleksi may be the result of Early Qenya phonetic changes like how [[eq|[ti] became [tsi]]] and (b) a stem form ending in ks- would become a final s in later Quenya phonology (PE19/104).