English
floorcest
From floor + -cest.
Formed from floor + -cest
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 Sexual involvement between students residing in the same dormitory and the same floor.
Language periods are conventional ranges, not dates for this word.
Etymograph / floorcest