A word appearing as ᴱQ. taste “fringe” in the Qenya Lexicon of the 1910s under the early root ᴱ√TASA (QL/89). 1940s ᴹQ. atsa “tassel, fryse, fringe” may be a later iteration, also derived from the root ᴹ√TAS (PE22/50 note #187).

Neo-Quenya: I would retain ᴺQ. tastë “fringe” for purpose of Neo-Quenya, but based on the Neo-Root ᴺ√TATH to avoid conflict with the later root √TAS “indicate”. I would not use atsa “fringe” since it conflicts with the more common ᴹQ. atsa “claw”; see that entry for discussion.