Q. arma n. “ray of sunlight” (Category: Sun)
A word for “a ray of sunlight” in Quenya Notes from 1957 (QN) derived from √AS “warmth” (PE17/148). I think it is a ray of light that is also warm, as opposed to alca which is merely bright but not warm.
Reference ✧ PE17/148 ✧ “a ray of sunlight”
|√AS > arma||[asma] > [azma] > [arma]||✧ PE17/148|