English

interunion

From inter- + union.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *h₁óynos ‘one’

…

Latin ūnus ‘one’

Late Latin ūniō ‘oneness’

Old French union

Middle English unyoun

English union

Today it means

adj Between unions.

Language periods are conventional ranges, not dates for this word.

Etymograph / interunion