obstinacy(state of stubbornness) noun [UK: ˈɒb.stɪ.nə.si] [US: ˈɑːb.stə.nə.si]
stubbornness(state of being stubborn) noun [UK: ˈstʌ.bən nəs] [US: ˈstʌ.bərn.nəs]Insisting is stubbornness. To persevere is determination. = Insistere è testardaggine. Perseverare è determinazione.