The east wind. So called, says Buttmann, from eös, the east. Probably it is eos eruʹo, drawn from the east. Ovid confirms this etymology: “Vires capit Eurus ab ortu.” Breman says it is a corruption of εωρoζ.
“While southern gales or western oceans roll,
And Eurus steals his ice-winds from the pole.”
Darwin: Economy of Vegetation, canto vi.