Where does “roomful” come from?

Roomful derives from English room plus the suffix -ful, with room descending from Middle English and Old English rūm, from Proto-Germanic rūmaz meaning spacious, ultimately from Proto-Indo-European pleh₁- meaning to fill.

roomful (English): The amount that a room can hold, especially the...

Definitions

  1. The amount that a room can hold, especially the...

Ancestry of “roomful”, step by step

roomful 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 ful

StepLanguageWordMeaning
1Englishful
Every word from Proto-Indo-European rewh₁-