Obdurate
(a.) Hardened in feelings, esp. against moral or mollifying influences; unyielding; hard-hearted; stubbornly wicked.
(a.) Hard; harsh; rugged; rough; intractable.
(v. t.) To harden.
Similar Words:
Obduracy Obdurate Obduration Obdure Obdured Obduredness Obdureness