συκοφάντις
From LSJ
ἀνδρῶν γὰρ σωφρόνων μέν ἐστιν, εἰ μὴ ἀδικοῖντο, ἡσυχάζειν → for it is the part of prudent men to remain quiet if they should not be wronged
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. s.v. συκίνη μάχαιρα (dub.).