σφοδρύνεσθαι

From LSJ

ἀεὶ δ' ἀρέσκειν τοῖς κρατοῦσιν → always try to please your masters, always be obsequious to the masters

Source

Greek > English (Woodhouse Verbs Reversed)

(see also σφοδρύνομαι): be vehement