Where does “restroom” come from?

Restroom comes from English room and English arrest, from Old French arester meaning "to stop," from Proto-Germanic rūmaz, Latin ad-, and Proto-Indo-European steh₂- meaning "to stand."

restroom (English): A room containing a public toilet: a public...

Definitions

  1. A room containing a public toilet: a public...

Ancestry of “restroom”, step by step

restroom traces back through two separate lines of ancestry.

via English REST

StepLanguageWordMeaning
1EnglishRESTAcronym of representational state transfer
2EnglisharrestA check, stop, an act or instance of arresting...
3Old Frencharesterto stop
4Vulgar LatinarrestoI cause to stop
5Latinrestōto stand firm; to stay behind
6Latinrĕ-back, backwards
7Latinprōdūcōto lead or bring forth, forward or out
8Latinprō-forward direction, forward movement
9Proto-Italic*pro-pro- see the Latin entry for further meanings
10Proto-Indo-Europeanpro-toward, forward
11Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
12Proto-Indo-Europeanper-before, in front; first; to go through
13Proto-Indo-Europeanpr̥tóspassed , crossed

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
Every word from Proto-Indo-European pr̥tós