obduracy Meaning, Definition & Usage

  1. noun resoluteness by virtue of being unyielding and inflexible
    adamance; unyieldingness.

WordNet

Ob"du*ra*cy noun
Definitions
  1. The duality or state of being obdurate; invincible hardness of heart; obstinacy. "Obduracy and persistency." Shak.
    The absolute completion of sin in final obduracy. South.

Webster 1913