English
roadable
From road + -able.
A compound of road + -able
Proto-Indo-European *reydʰ- ‘to ride’
Proto-Germanic *raidō ‘a ride’
Proto-West Germanic *raidu ‘riding’
Old English rād ‘riding’
Middle English rode ‘ride’
English road
Today it means
adj Capable of travelling on roads as well as in the air.
Language periods are conventional ranges, not dates for this word.
Etymograph / roadable