English

interfactor

From inter- + factor.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *dʰeh₁k-

…

Latin faciō ‘to do, make’

Latin factor ‘doer, maker’

Anglo-Norman factour

Middle English factour

Today it means

adj Between factors

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

Etymograph / interfactor