The Quenya word for “twenty” seems to have been yucainen from the 1920s to the 1950s (CPT/1298; PE14/49, 82), a combination of yu- “double” and cainen “ten”.
Conceptual Development: The Qenya Lexicon of the 1910s had two distinct words for “twenty” ᴱQ. atwen and ᴱQ. uiven, whose initial elements were based respectively on the two different the early dual roots ᴱ√ATA and ᴱ√WI (QL/33).
Neo-Quenya: Late in Tolkien’s life, Tolkien changed the Quenya word for “ten” to quëan or quain, so many Neo-Quenya writers update these early words to either ᴺQ. yúquëan or ᴺQ. yuquain. I prefer yuquain, since I believe quain is the form of “ten” used in compounds based on quainëa “tenth”.
The Quenya word for “twenty” seems to have been yucainen from the 1920s to the 1950s (CPT/1298; PE14/49, 82), a combination of yu- “double” and cainen “ten”.
Conceptual Development: The Qenya Lexicon of the 1910s had two distinct words for “twenty” ᴱQ. atwen and ᴱQ. uiven, whose initial elements were based respectively on the two different the early dual roots ᴱ√ATA and ᴱ√WI (QL/33).
Neo-Quenya: Late in Tolkien’s life, Tolkien changed the Quenya word for “ten” to quëan or quain, so many Neo-Quenya writers update these early words to either ᴺQ. yúquëan or ᴺQ. yuquain. I prefer yuquain, since I believe quain is the form of “ten” used in compounds based on quainëa “tenth”.