English
interaffect
From inter- + affect.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *dʰeh₁- ‘to put, do’
…
Latin faciō ‘to do, make’
Latin afficiō ‘to cause to experience; to treat’
Latin affectō ‘to strive after, pursue’
Middle English affecten
English affect
Today it means
verb To have an effect on each other.
Language periods are conventional ranges, not dates for this word.
Etymograph / interaffect