Where does “rūz” come from?

rūz (Middle High German) comes from Old High German ruoz, from Proto-Germanic hrōtaz, from Proto-Indo-European kreH(u)d- — grime, soot.

Ancestry of “rūz”, step by step

rūz traces back through two separate lines of ancestry.

via Old High German ruoz

StepLanguageWordMeaning
1Old High Germanruoz—
2Proto-Germanichrōtazsoot
3Proto-Indo-EuropeankreH(u)d-grime, soot

via Old High German hruoz

StepLanguageWordMeaning
1Old High Germanhruoz—
Every word from Proto-Indo-European kreH(u)d- →Every word from Proto-Germanic hrōtaz →Every word from Old High German ruoz →
rūz — Etymology, Origin & Word History | Etymology Explorer