κῦανοχαίτης

From LSJ

ὑποκατακλίνομαι τοῦ εὶς πλέον ἐναντιοῦσθαι → desist from further opposition;

Source

English (Autenrieth)

and κῦανο-χαῖτα: the dark-haired, epith. of Poseidon, also as subst.; dark-maned, ἵππος, Il. 20.224.