mëoi

noun "cat", a somewhat strange word by the standards of Tolkien's later Quenya there are no other instances of final -oi in the singular. Some would read *mëo, if the word is to be used in LotR-style Quenya. Vardo Mëoita "Prince of Cats"; mëoita here seems to be a kind of adjective rather than a genitive LT2:348. – Tolkien’s later, less problematic word yaulë may be preferred by writers PE16:132