ἦρξα

From LSJ

βωμὸν Ἀριστοτέλης ἱδρύσατο τόνδε Πλάτωνος, ἀνδρὸς ὃν οὐδ' αἰνεῖν τοῖσι κακοῖσι θέμιςAristotle had this altar of Plato set up — Plato, a man whom the wicked dare not even mention in praise

Source

French (Bailly abrégé)

v. ἄρχω.

Russian (Dvoretsky)

ἦρξα: aor. к ἄρχω.