<p><strong>Adjective</strong></p><ul><li>unmoved by persuasion, pity, or tender feelings; stubborn; unyielding.</li><li>Synonyms: inflexible, unbending, callous, obstinate, hard.</li><li>Antonyms: tractable, soft.</li><li>stubbornly resistant to moral influence; persistently impenitent: an obdurate sinner.</li><li>Synonyms: shameless, reprobate, unregenerate.</li><li>Antonyms: repentant, humble.</li></ul><p><strong>End of Response</strong></p>