προσσυκοφαντέω
From LSJ
εἰ γάρ κεν καὶ σμικρὸν ἐπὶ σμικρῷ καταθεῖο καὶ θαμὰ τοῦτ᾽ ἔρδοις, τάχα κεν μέγα καὶ τὸ γένοιτο → for if you add only a little to a little and do this often, soon that little will become great (Hesiod W&D, 361-362)
English (LSJ)
A slander besides, D.55.29 (sed leg. divisim).
German (Pape)
[Seite 780] noch dazu verleumden, τοὺς ἠδικημένους, Dem. 55, 29.