ᴱ√QASA root. “*shake”
An unglossed root in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. qasa- “shake, flap, nod, rustle”, ᴱQ. qasilla “tuft, nodding spray, tassel, plume”, G. cwas- “shake, nod, wag”, and G. cwathli “plume, spray, tassel” (QL/76; GL/28).
Neo-Eldarin: For purposes of Neo-Eldarin, I think it is useful to salvage these early words by positing a Neo-Eldarin root ᴺ√KWATH.
Reference ✧ QL/76