with 1st person suffix úalyë, imperative particle á, a combined with the negation ú- to express a prohibition úalyë mittanya me, *"do not thou lead us", VT43:9, 21-22. However, Tolkien apparently abandoned úa in favour of ala, alalyë, q.v. later he also used the form áva for "don't". Compare ua.
Quettaparma Quenyallo (Quenya-English).