English
floormate
From floor + -mate.
A compound of floor + -mate
Proto-Indo-European *pleh₂- ‘flat’
…
Proto-Germanic *flōraz ‘ground’
Proto-West Germanic *flōr
Old English flōr ‘floor’
Middle English floor
English floor
Today it means
noun A person with whom one shares a floor in a building.
Language periods are conventional ranges, not dates for this word.
Etymograph / floormate