κατειπεῖν

From LSJ

ἐν πιθήκοις ὄντα δεῖ εἶναι πίθηκον → in Rome we do as the Romans do | when in Rome, do as the Romans do | when in Rome, do as the Romans | when in Rome, do like the Romans do | when in Rome | being among monkeys one has to be a monkey

Source

Greek > English (Woodhouse Verbs Reversed)

(see also κατεῖπον): betray, publish, denounce one person to another, inform against