caista

"k", fraction "one tenth" 1/10, also cast, an unusual Quenya form since the language does not normally tolerate two consonants finally VT48:11. Compound caistanótië "k" "decimal system" in counting ibid. However, Tolkien later rejected the root KAYAN "ten" in favour of KWAYAM, changing the cardinal "ten" from cainen to quain, quëan VT48:13. Apparently we must therefore read *quaista as the new fraction "one tenth".