unregenerate

Adjective

• unrepentant and incapable of being reformed
  • an unregenerate criminal
    

• not reformed morally or spiritually
  • unregenerate human nature
    
  • unregenerate conservatism
    

• tenaciously unwilling or marked by tenacious unwillingness to yield

Related words

• Synonyms: 
  unreformable , unregenerated , stubborn , obstinate
• Antonyms: 
  regenerate , docile