τέρψομαι

From LSJ

ὁ δὲ πείσεται εἰς ἀγαθόν περ → he will obey you to his profit, he will obey you for his own good end

Source

French (Bailly abrégé)

fut. Moy. de τέρπω;
sbj. ao. Moy. poét. de τέρπω.