A verb appearing as ᴱQ. nyasa- “to scratch” in the Qenya Lexicon of the 1910s, derived from the early root ᴱ√NYASA (QL/68).
Neo-Quenya: I would retain ᴺQ. nyas- “to scratch” for purposes of Neo-Quenya, but would assume it was derived from a Neo-Root ᴺ√NYATH “scratch”, where its s was originally þ.
A noun appearing as ᴱQ. nyas “scratch, score, line, mark” in the Qenya Lexicon of the 1910s with a stem form of nyast-, derived from the early root ᴱ√NYASA (QL/68).
Neo-Quenya: I would retain ᴺQ. nyas “scratch, score, line, mark” for purposes of Neo-Quenya, but would assume it was derived from a Neo-Root ᴺ√NYATH “scratch”, so having a stem form of nyaþ-.