τὸ δυσμετάτρεπτον
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
Spanish
la inflexibilidad, inflexibilidad
Translations
inflexibility
Catalan: inflexibilitat; French: inflexibilité; Galician: inflexibilidade; Greek: αδιαλλαξία, ακαμψία; Ancient Greek: ἀκαμψία, ἀτροπία, ἀτροπίη, τὸ ἄγναμπτον, τὸ ἀνένδοτον, τὸ ἄτεγκτον, τὸ δυσμετάτρεπτον; Italian: inflessibilità; Portuguese: inflexibilidade; Spanish: inflexibilidad