Where does “rumthe” come from?

rumthe (Middle English) comes from Old English rȳmþ, from Proto-Germanic rūmiþō, from Proto-Germanic rūmaz, from Proto-Indo-European rewh₁- — free space.

Ancestry of “rumthe”, step by step

StepLanguageWordMeaning
1Old Englishrȳmþroominess, spaciousness
2Proto-Germanicrūmiþōroominess
3Proto-Germanicrūmazroomy, spacious, open
4Proto-Indo-Europeanrewh₁-free space
Every word from Proto-Indo-European rewh₁- →Every word from Proto-Germanic rūmaz →Every word from Proto-Germanic rūmiþō →