συκοφάντις
From LSJ
οὗτος μὲν ὁ πιθανώτερος τῶν λόγων εἴρηται, δεῖ δὲ καὶ τὸν ἧσσον πιθανόν, ἐπεί γε δὴ λέγεται, ῥηθῆναι → this is the most credible of the stories told; but I must relate the less credible tale also, since they tell it
English (LSJ)
ιδος, ἡ,= συκοφάντρια, fem. of συκοφάντης (common informer, voluntary denouncer, extortioner, professional swindler, confidential agent, sycophanta, humbug, delator, false accuser, slanderer, sycophant, false adviser), Suid. A s.v. συκίνη μάχαιρα (dub.).