English

interspatial

From inter- + spatial.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Latin spatium ‘space, room, extent’

Today it means

adj Between spaces.

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

Etymograph / interspatial