adamance

n.resoluteness by virtue of being unyielding and inflexible

同义词：obduracyunyieldingness

1. Her adamance on the issue surprised everyone.
   她在这个问题上的坚决让每个人都感到惊讶。
2. The adamance of his stance made negotiations difficult.
   他立场的坚定使谈判变得困难。