Qenya
immatwe
pronoun. either (when there is no choice)
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!
The correlative ᴹQ. immatwe “either (when there is no choice)” appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/107), a combination of ᴹQ. imma “any” and ᴹQ. atwe “one of the two”.
Neo-Quenya: Since ᴹQ. imma “any” too closely resembles the later prefix Q. im- “same”, for purposes of Neo-Quenya I would update this to ᴺQ. aiatwë “either” using the hypothetical prefix ᴺQ. ai(a)- “any”; see that entry for discussion.