Obduracy (noun)

1. The quality of being stubbornly unyielding or resistant to change or persuasion.
2. The state or quality of being hard to deal with or control.

Origin:

From the latin word obdurare, meaning "to harden" or "to make hard", from ob- meaning "toward" and durare meaning "to harden".

Examples:

1. His obduracy was frustrating; he refused to listen to any alternative ideas.
2. Despite the evidence presented, the defendant"s obduracy led to the jury"s inability to reach a verdict.
3. The manager"s obduracy in refusing to change the company"s policies led to the loss of many valuable employees.
4. Her obduracy in the face of adversity was admirable, she never gave up hope.
5. His obduracy caused much difficulty in negotiations, as he refused to budge on any point.