Where does “entryroom” come from?

entryroom (English) comes from English Entry, from Middle English entre, from Old French entree, from Latin intrō, from Latin intra, from Latin interus, from Proto-Indo-European h₁énteros, from Proto-Indo-European -teros — Contrastive or oppositional adjectival suffix.

entryroom (English): A room at the entrance of a structure

Definitions

  1. A room at the entrance of a structure

Ancestry of “entryroom”, step by step

entryroom traces back through two separate lines of ancestry.

via English Entry

StepLanguageWordMeaning
1EnglishEntryThe act of entering
2Middle EnglishentreEntrance, entry; movement into
3Old Frenchentree
4Latinintrōto enter, go into, come in, get in, penetrate
5Latinintrawithin; inside; during; less than
6Latininterus
7Proto-Indo-Europeanh₁énterosinside, within
8Proto-Indo-European-terosContrastive or oppositional adjectival suffix

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 -teros