ἐκμανθάνειν

From LSJ

ἄνευ γὰρ φίλων οὐδεὶς ἕλοιτ᾽ ἂν ζῆν, ἔχων τὰ λοιπὰ ἀγαθὰ πάντα → without friends no one would choose to live, though he had all other goods

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ἐκμανθάνω): be acquainted with, learn by heart, learn by rote