The Qenyaqetsa is a phonology and lexicon of Qenya written by J.R.R. Tolkien. His son Christopher published some fragments in the Appendices of The Book of Lost Tales Part One and Part Two, referring to it as Qenya Lexicon. The full text was published in Parma Eldalamberon 12 (1998).
The manuscript was a notebook, and Tolkien included the number '23' in the first page, suggesting it was begun between 1915 and 1916, when he had that age. Many revisions were made until 1919 or 1920. Both the description of the phonology and the lexicon were the foundation of the Qenya language, which decades later would become the Quenya.
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, Appendix: Names in the Lost Tales – Part I, p. 246-248
- J.R.R. Tolkien, "Qenyaqetsa: The Qenya Phonology and Lexicon", in Parma Eldalamberon XII (edited by Carl F. Hostetter, Christopher Gilson, Arden R. Smith, and Patrick H. Wynne), pp. xii-xvii