noun the trait of being difficult to handle or overcome.
— synonyms: obstinacy, obstinance, mulishness
noun resolute adherence to your own ideas or desires.
— synonyms: bullheadedness, obstinacy, obstinance, pigheadedness, self-will
Examples
“What is stubbornness? It is not only refusing to believe a crucial message, but also shunning or at least looking down on those, who stated or believed it in the first place.
Perhaps only when it's too late for regrets will that person understand.”