στασιαστικός
From LSJ
οὐκ ἔστ' ἀλώπηξ ἡ μὲν εἴρων τῇ φύσει ἡ δ' αὐθέκαστος → foxes are not one of a treacherous nature and the other straightforward, the nature of foxes is not for one to be treacherous and the other straightforward
English (LSJ)
ή, όν,
A seditious, factious, opp. πολιτικός, Pl.Plt.303c; λόγοι Aeschin.3.208; πράττειν οὐδὲν σ. Plu.Cor.6. Adv., -κῶς ἔχειν to be factious, πρός τινας D.9.21, 18.61; σ. χρῆσθαι τοῖς ὀστρακισμοῖς in a factious spirit, Arist.Pol.1284b22.