Where does “rudhlas” come from?

rudhlas (Cornish) comes from Cornish rudh, from Middle Cornish ruth,ruyth, from Old Cornish rud, from Proto-Brythonic rrʉð, from Proto-Celtic roudos, from Proto-Indo-European h₁rewdʰ- — red.

rudhlas (Cornish): purple, reddish blue

Definitions

  1. purple, reddish blue

Ancestry of “rudhlas”, step by step

rudhlas traces back through two separate lines of ancestry.

via Cornish rudh

StepLanguageWordMeaning
1Cornishrudhred
2Middle Cornishruth,ruyth
3Old Cornishrud
4Proto-Brythonicrrʉðred
5Proto-Celticroudosred
6Proto-Indo-Europeanh₁rewdʰ-red

via Cornish glas

StepLanguageWordMeaning
1Cornishglasblue; green; grey
2Proto-Brythonicglasgreen, blue
3Proto-Celticglastosgreen, blue
4Proto-Indo-Europeanǵʰl̥h₃stós
5Proto-Indo-Europeanǵʰelh₃-to flourish; green, yellow
Every word from Proto-Indo-European h₁rewdʰ-Every word from Proto-Celtic roudosEvery word from Proto-Brythonic rrʉð