obduracy(The state of being obdurate, intractable, or stubbornly inflexible) noun [UK: ˈɒb.djʊə.rə.si] [US: ˈɒb.djʊə.rə.si]
obstinacy(state of stubbornness) noun [UK: ˈɒb.stɪ.nə.si] [US: ˈɑːb.stə.nə.si]Miss Wang has a trace of obstinacy in her, but she is still a good student. = La señorita Wang tiene un vestigio de obstinación en ella, pero aun así es una buena estudiante.