English
intergender
From inter- + gender.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *ǵenh₁- ‘to produce, beget’
…
Proto-Italic *genos
Latin genus ‘birth, origin; kind, type’
Old French gendre ‘type, kind’
Middle English gendre ‘type’
English gender
Today it means
adj Taking place between people of opposite genders.
Language periods are conventional ranges, not dates for this word.
Etymograph / intergender