Liddell-Scott-Jones

ἑταιρία (hetairia) friendship ^TEGMC

ἑταιρία-εία, ἡ,

also ἑταιρίαία, [Refs 5th c.BC+]; Ionic dialect ἑταιρία-ηΐη: (ἑταῖρος):— association, brotherhood, τῶν ἡλικιωτέων [ἑταιρίαείας 4th c.BC: Aristoteles Philosophus “Historia Animalium” 611a7 ">Refs 5th c.BC+]; of a social group in Crete, [Refs]

__2 at Athens and elsewhere, political club or union for party purposes, [ἑταιρίαιῶν ἐπ᾽ ἀρχάς [prev. author] “Tht.” 173d ">Refs 5th c.BC+]; at Carthage, τὰ συσσίτια τῶν ἑ., compared to the φιδίτια at Sparta, [Refs 4th c.BC+]
__3 = Latin collegium, ἑταιρίαία Ἰουλιανή, = collegium Lupercorum Juliorum, [Refs 2nd c.AD+]
__II generally, friendly connexion, friendship, comradeship, [Refs 5th c.BC+]; opposed to ἔχθρα, [Refs 4th c.BC+]
__III ={ἑταίρησις}, [Refs 5th c.BC+]