The butter not only adds richness to the burger and prevents it from drying out, but it also butters the bun for you. We're not going to downplay it, these burgers are decadent. But, if you're going to eat a burger, you may as well do it right. And, this recipe does it so right.
The word persistence means the quality of being determined to do or achieve something. It's tenacity. It means firmness of purpose. It is a continuing, repeating or lasting of something. Use the link and read a few similar definitions.
Stubborn means someone who is persistent, but almost in a rude way of one who wants something but won't listen to anyone's advice. On a sentence: He is so stubborn he wouldn't listen to his mother's advice and did it his way. 2) For THINGS-I can also mean something that keeps repeating or that is continuous.f you'd looked it up once, and then again and again, then you'd have been persistent. Someone who doesn't give up, who tries everything to get to their goal is persistent. It can aso mean someone who repeats the same behaviour over and over again -- eg a persistent offender (habitual criminal).