You searched for: “obstinacy
obstinacy (s) (noun), obstinacies (pl)
1. The condition of stubbornness and persistence: Little Tony really adhered to his obstinacy in that he had his own opinion about having ice cream before his vegetables and was quite determined and cried loudly in the restaurant!
2. The state of being problematic to remedy, to subdue, or to relieve: The obstinacy of her terrible cough took many weeks to get over!