Why this word is great
FROSTBOW — [Noun] A white arc or circle in the sky during frosty weather, formed by the reflection of sunlight from ice crystals floating in the air. Blend of frost (from Old English forst, meaning 'freezing cold') + rainbow (from Old English renboga, meaning 'rain arch'). Unlike 'rainbow' (which dazzles with prismatic fire) or 'halo' (which crowns the sun with spectral reverence), a frostbow is a ghost of light, a pale cipher written in the winter air. It is the glint of sun on a frozen pond at dawn, the shimmer of breath in subzero stillness, the way a single ice crystal catches the light and throws it back, uncolored and pure—a reminder that beauty need not shout to be seen.