Where does “frostbow” come from?

frostbow (English) comes from English rainbow, from German Regenbogen, from Middle High German rëgenboge, from Old High German reginbogo, from Proto-Germanic regnabugô, from Proto-Germanic bugô, from Proto-Indo-European bʰugʰ-, from Proto-Indo-European bʰewgʰ- — to bend; curve, arch.

frostbow (English): A white arc or circle in the sky during frosty...

Definitions

  1. A white arc or circle in the sky during frosty...

Ancestry of “frostbow”, step by step

frostbow traces back through two separate lines of ancestry.

via English rainbow

StepLanguageWordMeaning
1EnglishrainbowA multicoloured arch in the sky, produced by...
2GermanRegenbogenrainbow
3Middle High Germanrëgenboge
4Old High Germanreginbogorainbow
5Proto-Germanicregnabugôrainbow
6Proto-Germanicbugôbow
7Proto-Indo-Europeanbʰugʰ-bow; arch
8Proto-Indo-Europeanbʰewgʰ-to bend; curve, arch

via English Frost

StepLanguageWordMeaning
1EnglishFrostA cover of minute ice crystals on objects that are exposed to the air. Frost is formed by the same process as dew, except that the temperature of the frosted object is below freezing
2Middle EnglishfrostCold, freezing, or frosty weather; weather that...
3Old Englishfrostproduced by metathesis
4Proto-Indo-Europeanprustósfrost
Every word from Proto-Indo-European bʰewgʰ-