στυφρόν

From LSJ

ἄμεινον γὰρ ἑαυτῷ φυλάττειν τὴν ἐλευθερίαν τοῦ ἑτέρων ἀφαιρεῖσθαι → for it is better to guard one's own freedom than to deprive another of his

Source

Greek (Liddell-Scott)

στυφρόν: «στερέμνιον· βαρὺ» Ἡσύχ.