English
inter-regional
From inter- + regional.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *h₃reǵ- ‘to straighten’
…
Latin regō ‘to rule’
Latin regiō ‘region’
Latin regiōnālis ‘of or belonging to a region’
Middle French régional
English regional
Today it means
adj —
Language periods are conventional ranges, not dates for this word.
Etymograph / inter-regional