ἑταῖρος ἔτης a comrade, companion, mate, Hom.; a common way of addressing people, ὦ ʼταῖρε my good friend, Ar.; φίλʼ ἑταῖρε Theogn.; pupils or disciples were the ἑταῖροι of their masters, as those of Socrates, Xen.:—c. gen., δαιτὸς ἑταῖρε partner of my feast, Hhymn.; πόσιος καὶ βρώσιος ἑταῖροι mess mates, Theogn. metaph. of things, ἐσθλὸς ἑταῖρος, of a fair wind, Od.; c. dat., βίος ὁ σοφοῖς ἕταρος Anth.: as adj. associate in a thing, c. gen., Plat.: Sup., ἑταιρότατος Plat.