Ἀρείων

From LSJ

τὴν οἴησιν ἔλεγε προκοπῆς ἐγκοπήν → he used to say, Opinion forming is the stoppage of progress

Source

English (Autenrieth)

Arīon, name of the horse of Adrastus at the siege of Thebes, Il. 23.346.

Russian (Dvoretsky)

Ἀρείων: ονος ὁ Арейон (имя лошади Адраста Hom. и Геракла Hes.).

Spanish (DGE)

v. Ἀρίων.