English
floatbase
From float + base.
Proto-Indo-European *plewd- ‘to float, swim, fly’
Proto-Germanic *flutōną ‘to float’
Proto-West Germanic *flotōn ‘to float’
Old English flotian ‘to float’
Middle English floten ‘to float’
English float
Proto-Indo-European *gʷem- ‘to come’
…
Ancient Greek βᾰ́σῐς ‘stepping’
Latin basis ‘a pedestal’
Old French base
Middle English base ‘a foundation or base’
English base
Today it means
noun An airport for floatplanes.
Language periods are conventional ranges, not dates for this word.
Etymograph / floatbase