Obdurate

ob′dū-rāt, adj. hardened in heart or in feelings: difficult to influence, esp. in a moral sense: stubborn: harsh.— n. Ob′dūracy , state of being obdurate: invincible hardne of heart.— adv. Ob′dūrately .— ns. Ob′dūrate ne , Obdūrā′tion .— adj. Obdūred′ , hardened. [L. obdurāre , -ātum — ob , against, durāre , to harden— durus , hard.]