Obstinance is a characteristic of being impossibly stubborn. Like a bull that won’t budge, obstinance keeps people from going with the flow. If everybody wants to watch a movie you dislike, don’t let your obstinance ruin family movie night.
When someone is obstinate, they are strong-willed and determined, so you can use the word obstinance to describe this quality. There’s the obstinance of a two-year old who refuses to go to bed, or the obstinance of someone who believes that aliens built the pyramids and can’t be convinced otherwise. The Latin root of obstinance is obstinare, "stand stubbornly."