ἑταιρική
From LSJ
Δύναται τὸ πλουτεῖν καὶ φιλανθρώπους ποιεῖν → Being rich can even produce a social conscience → Animos nonnumquam humanos concinnant opes → Mitunter macht der Reichtum Menschen auch human
Russian (Dvoretsky)
ἑταιρική: ἡ товарищество, дружба Arst.