English
interfamilial
From inter- + familial.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *dʰeh₁- ‘to do, place, put’
Proto-Indo-European *dʰh₁-m-eló-
Latin famulus ‘servant’
Latin familia ‘family’
French familial ‘relating to a family’
English familial
Today it means
adj Between families
Language periods are conventional ranges, not dates for this word.
Etymograph / interfamilial