Where does “darkroom” come from?

Darkroom comes from English dark and room, where room derives from Middle English rome, Old English rūme, Proto-Germanic rūmaz, and Proto-Indo-European dʰerg-, meaning space or expanse.

darkroom (English): A dark room, where photographs are developed; A...

Definitions

  1. A dark room, where photographs are developed; A...

Ancestry of “darkroom”, step by step

darkroom traces back through two separate lines of ancestry.

via English dark

StepLanguageWordMeaning
1EnglishdarkHaving an absolute or relative lack of light;...
2Middle Englishderkdark
3Old Englishdeorcdark
4Proto-West Germanicderkdirty; dark
5Proto-Germanicderkaz
6Proto-Indo-Europeandʰerg-o-s
7Proto-Indo-Europeandʰerg-to dim, darken; dim, dull; dark, dusky
8Proto-Indo-Europeandʰer-to support; to hold

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 dʰer-