Etymology of the English word squirrel
the English word squirrel
derived from the Old French word esquireul
derived from the Late Latin word sciurus (squirrel)
derived from the Greek word skiouros, σκίουρος
derived from the Greek word oura, οὐρά (tail; a tail)
derived from the Proto-Indo-European root *ors- (tail)
derived from the Greek word skia, σκιά (shadow; 'shade' or a shadow (literally or figuratively (darkness of error or an adumbration)))
using the Greek suffix -morphe