τελεοῦσθαι
From LSJ
Κατὰ τὴν ἰδίαν φρόνησιν οὐδεὶς εὐτυχεῖ → Suo arbitratu nullus est felix satis → Kein Mensch nach seinem eignen Denken glücklich ist
Greek > English (Woodhouse Verbs Reversed)
(see also τελειόω): come of age, come to manhood, come to perfection