Where does “ruw” come from?

ruw (Middle Welsh) comes from Old French rue, from Latin rūga, from Proto-Indo-European krewp-, from Proto-Indo-European krew- — to fall, collapse; scab; to fall, break, bruise.

Ancestry of “ruw”, step by step

StepLanguageWordMeaning
1Old Frenchruerue (plant)
2Latinrūgaa crease in the face, wrinkle
3Proto-Indo-Europeankrewp-scab, crust; to become encrusted
4Proto-Indo-Europeankrew-to fall, collapse; scab; to fall, break, bruise

Words derived from “ruw”

Every word from Proto-Indo-European krew- →Every word from Proto-Indo-European krewp- →Every word from Latin rūga →