Where does “dayglow” come from?

dayglow (English) comes from English Day, from Middle English day, from Old English dæġ, from Proto-West Germanic dag, from Proto-Germanic dagaz, from Proto-Indo-European dʰegʷʰ- — to burn; warm, hot.

dayglow (English): The airglow of the sky during the day

Definitions

  1. The airglow of the sky during the day

Ancestry of “dayglow”, step by step

dayglow traces back through two separate lines of ancestry.

via English Day

StepLanguageWordMeaning
1EnglishDayderived from a medieval diminutive of David
2Middle Englishdayday; daylight, sunlight; epoch, age, period
3Old Englishdæġday, daytime
4Proto-West Germanicdagday
5Proto-Germanicdagazday; name of the D-rune
6Proto-Indo-Europeandʰegʷʰ-to burn; warm, hot

via English glow

StepLanguageWordMeaning
1EnglishglowTo give off light from heat or to emit light as...
2Middle Englishglouen—
3Old Englishglōwanto glow
4Proto-Germanicglōanąto glow
5Proto-Indo-European*ǵʰleh₁-to shine, glow
Every word from Proto-Indo-European dʰegʷʰ- →
dayglow — Etymology, Origin & Word History | Etymology Explorer