Where does “bathroom” come from?

Bathroom is a modern English compound of bath and room, where room derives from Old English rūme, Proto-Germanic rūmaz, and Proto-Indo-European rowə-, ultimately from the root bʰeh₁- meaning to grow or become.

bathroom (English): A room containing a shower and/or bathtub, and a...

Definitions

  1. A room containing a shower and/or bathtub, and a...

Ancestry of “bathroom”, step by step

bathroom traces back through two separate lines of ancestry.

via English room

StepLanguageWordMeaning
1EnglishroomOpportunity or scope; Space "for" something, or...
2Middle EnglishroumA space or area; A room
3Old Englishrūmroom, space; roomy, spacious, ample, extensive,...
4Proto-West Germanicrūmroomy, spacious; room, open space
5Proto-Germanicrūmazroomy, spacious, open
6Proto-Indo-Europeanrewh₁-free space

via English Bath

StepLanguageWordMeaning
1EnglishBathAn English marquisate
2Middle EnglishbaþAlternative form of bath
3Old Englishbæþbath; baptismal font
4Proto-West Germanicbaþbath
5Proto-Germanicbaþąbath
6Proto-Indo-Europeanbʰeh₁-to foment; warm; bathe

Words derived from “bathroom

Every word from Proto-Indo-European rewh₁-