English
interindividual
From inter- + individual.
A compound of inter- + individual
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *h₁weydʰh₁- ‘to divide’
…
Latin dīviduus ‘divisible’
Latin indīviduus ‘indivisible’
Latin indīviduum ‘an indivisible thing’
Medieval Latin indīviduālis ‘indivisible’
English individual
Today it means
adj Occurring between individuals.
Language periods are conventional ranges, not dates for this word.
Etymograph / interindividual