ἐπιμανθάνειν

From LSJ

οὐκ ἔστι γῆρας τοῦδε τοῦ μιάσματος → that pollution never wears out, that pollution can never grow old

Source

Greek > English (Woodhouse Verbs Reversed)

(see also: ἐπιμανθάνω) learn subsequently

Lexicon Thucydideum

discere postea, to learn afterward, 1.138.3.