An unglossed root ᴱ√NYASA appeared in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. nyas “scratch, score, line, mark” and ᴱQ. nyasa- “to scratch” (QL/68). There are no signs of this root in Tolkien’s later writing, but I think it is worth retaining its derivatives for purposes of Neo-Eldarin. However, it would need to become a Neo-Root ᴺ√NYATH to preserve the Early Qenya verb ᴱQ. nyasa-, since a direct derivative of √NYAS would become nyar-, conflicting with the later verb Q. nyar- “tell”.