calumniate
From LSJ
ἡ κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person
P. and V. διαβάλλω, διαβάλλειν, λοιδορεῖν (or mid. with dat.), P. βασκαίνειν, Ar. and P. συκοφαντεῖν, V. κακοστομεῖν, see abuse.
