Where does “Rauhfaser” come from?

Rauhfaser (German) comes from German rauh, from Middle English rawe, from Old English hrēaw, from Proto-West Germanic hrau, from Proto-Germanic hrawaz, from Proto-Indo-European krewh₂- — blood outside the body.

Ancestry of “Rauhfaser”, step by step

Rauhfaser traces back through two separate lines of ancestry.

via German rauh

StepLanguageWordMeaning
1GermanrauhObsolete spelling of rau
2Middle Englishraweraw; raw, unprocessed, unfiltered; wounded, hurt,...
3Old Englishhrēawraw, uncooked
4Proto-West Germanichrauraw
5Proto-Germanichrawazraw, uncooked
6Proto-Indo-Europeankrewh₂-blood outside the body

via German Faser

StepLanguageWordMeaning
1GermanFaserfibre
2Old High Germanfasofibre
3Proto-Germanicfasōnfiber
Every word from Proto-Indo-European krewh₂- →
Rauhfaser — Etymology, Origin & Word History | Etymology Explorer