1. (

• cussed ,
• obdurate ,
• obstinate ,
• unrepentant

) stubbornly persistent in wrongdoing ;

2. (

• flinty ,
• flint ,
• granitic ,
• obdurate ,
• stony

) showing unfeeling resistance to tender feelings; "his flinty gaze"; "the child's misery would move even the most obdurate heart" ;