atar vohu-fryana, "the atar of good affection" (compare "fire", cognate with bhaga and friend), later qualified as "the fire diffusing goodness", and "the fire that consumes both water and food".
atar vazishta, "the atar most swift" (compare "electric sparks"), later qualified as the fire in clouds, i.e. lightning, and as "the fire that neither drinks water nor eats food".