Where does “rō” come from?

rō (Old English) comes from Proto-West Germanic rōu, from Proto-Germanic *rōō, from Proto-Indo-European h₁reh₁- — to row; to separate; loose, sparse, rare.

Ancestry of “rō”, step by step

StepLanguageWordMeaning
1Proto-West Germanicrōucalm, quiet; rest, repose
2Proto-Germanic*rōōcalm, quiet
3Proto-Indo-Europeanh₁reh₁-to row; to separate; loose, sparse, rare

Words derived from “rō”

Every word from Proto-Indo-European h₁reh₁- →Every word from Proto-Germanic *rōō →Every word from Proto-West Germanic rōu →