obdurate
\OB-doo-rit
adjective
1. unmoved by persuasion, pity, or tender feelings; stubborn; unyielding.
2. stubbornly resistant to moral influence; persistently impenitent: an obdurate sinner.
Quotes
Still, Michael was unforgiving. Stubborn as a balking goat. When, after they’d become engaged, Corinne had wanted to see her friend one final time to explain what had happened, Michael was obdurate in opposition: no.
— Joyce Carol Oates, We Were the Mulvaneys, 1996