Aglow means shining with a warm soft light. The room was aglow, aglow with candles, faces aglow.
It comes after the noun and it is literary — things are aglow and there are no aglow things. It takes with. Of a face it means flushed with pleasure or exertion. Note that the a- here is the old form of on, as in ablaze, afire and asleep.
1adjectiveaglowShining with a warm soft light.
“The whole village was aglow with lanterns on the night of the festival.”
aglow is a state of glowing.
Proto-Indo-European
*ǵʰleh₁-
Middle English
glouen
English
glow
English, today
aglow
Built from
From a- + glow. glow The is derived from Middle English glouen, glowen (“to give off heat and light without flame; of a thing: to be heated until red hot; to be brightly coloured; to shine brightly; (figurative) to be filled with emotion; of the face, etc.: to turn red, flush; etc.”), and then either:
Etymology from Wiktionary, CC BY-SA