ἱππομαχεῖν
From LSJ
ἀναρχία γάρ ἐστιν ἡ πλεισταρχία → the rule of the widest sway of opinion is the same as no rule at all (Gregory Nazianzenus, De vita sua 1744)
Greek > English (Woodhouse Verbs Reversed)
(see also ἱππομαχέω): fight cavalry battle