Where does “interregional” come from?

Interregional comes from Latin inter- (between) and Latin regionalis (of a region), ultimately tracing to Proto-Indo-European h₃reǵ- (to direct or rule) and wel- (to turn or roll).

interregional (English): Of, pertaining to, or connecting two or more...

Definitions

  1. Of, pertaining to, or connecting two or more...

Ancestry of “interregional”, step by step

interregional traces back through 3 separate lines of ancestry.

via English inter

StepLanguageWordMeaning
1EnglishinterTo bury in a grave; To confine, as in a prison
2Middle Englishenteren
3Frenchentrerto enter
4Middle Frenchentrerto enter
5Old Frenchentrerto enter
6Latinintrōto enter, go into, come in, get in, penetrate
7Latinintrawithin; inside; during; less than
8Latininterus
9Proto-Indo-Europeanh₁énterosinside, within
10Proto-Indo-European-terosContrastive or oppositional adjectival suffix

via English region

StepLanguageWordMeaning
1EnglishregionAny considerable and connected part of a space or...
2Middle Englishregiounrealm, nation, country; authority, governance;...
3Anglo-Normanregiunregion
4Latinregiōdirection, line
5LatinAemilia
6Latinaemulusstriving to equal or excel, rivaling; in a bad...
7Proto-Italicaimelosstriving to equal or excel, rivaling; in a bad...
8Proto-Italicaimosimitation
9Proto-Indo-Europeanh₂eym-to copy, imitate

via English AL

StepLanguageWordMeaning
1EnglishALInitialism of assembly language; Initialism of...
2Dutchalall, all of; already; yet
3Middle Dutchalall, all of; completely; even though, no matter...
4Old Dutchāl
5Proto-West Germanicallall
6Proto-Germanicallazall
7Proto-Indo-Europeanh₂él-to grow, nourish
Every word from Proto-Indo-European -terosEvery word from Proto-Indo-European h₁énterosEvery word from Latin interus