Obdurate (adjective)

Unyielding and inflexible in attitude or opinion; stubborn; unresponsive to persuasion or tender feelings.

Origin:

Derived from the latin word "obduratus" meaning "hardened in feeling or purpose", it was first recorded in the late 16th century.

Examples:

1. The jury was obdurate and refused to consider any evidence that did not support their preconceived notions.
2. He was an obdurate man who would not change his mind, no matter how much evidence was presented to him.
3. Her obdurate attitude made it difficult for her to form close relationships.
4. He was obdurate in his refusal to apologize, even when it was clear he was in the wrong.
5. The obdurate old man refused to leave his home, even as the floodwaters rose around him.