Q. alca- v. “to glitter” (Category: Flash, Lightning)
A verb for “glitter” in the second version of Tengwesta Qenderinwa (TQ2) written around 1950 (PE18/87). Its ancient form ✶ak’la- was glossed “shine out, flash”, an abnormal vocalization of the verbal root √KAL “shine”, where Tolkien said “these formations appear to have been often intensive, or descriptive of sudden action”. Thus I think this verb was more properly used for a sudden flash of light. It is possible that the semantics of the verb changed to a more gentle or gradual glittering, but Quenya has other verbs for “twinkle”, “glitter” and “sparkle” (tintila-, mirilya-, ita-), and I would use alca- primarily with the sense “flash” in Neo-Quenya.
Reference ✧ PE18/87 ✧ alka- “glitter”
|✶ak’la- > alka-||[akla-] > [alka-]||✧ PE18/87|