English
interoffice
From inter- + office.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *h₃ep- ‘to work’
…
Latin opificium ‘construction: the act of building or the…’
Latin officium ‘duty; official position; function’
Old French office
Middle English office
English office
Today it means
adj Taking place between different offices of a single organization or company.
Language periods are conventional ranges, not dates for this word.
Etymograph / interoffice