English
swimmable
From swim + -able.
A compound of swim + -able
Proto-Indo-European *swem(bʰ)- ‘to be unsteady, move, swim’
Proto-Germanic *swimmaną ‘to swim’
Proto-West Germanic *swimman ‘to swim’
Old English swimman ‘to swim, float’
Middle English swymmen ‘to swim’
English swim
Today it means
adj Able to be swum in or across
Language periods are conventional ranges, not dates for this word.
Etymograph / swimmable