ἑορτάζειν
From LSJ
Αὐτάρκης ἔσῃ, ἂν μάθῃς τί τὸ καλὸν κἀγαθόν ἐστι → You will be contented with your lot if you learn what the honourable and good is
Greek > English (Woodhouse Verbs Reversed)
(see also ἑορτάζω): hold a celebration, keep festival, keep holiday