English
intervortex
From inter- + vortex.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *wert- ‘to turn, to rotate, spin’
Proto-Italic *wertō ‘to turn’
Latin vertō ‘to turn around, turn about’
Latin vertex ‘whirl, whirlpool, eddy, vortex’
English vortex
Today it means
adj Between vortices
Language periods are conventional ranges, not dates for this word.
Etymograph / intervortex