unregenerate
un-re-gen-er-ate
adjective
Not reformed or improved; stubbornly resistant to moral or spiritual change.
"His unregenerate nature caused much strife."
Thesaurus
Synonyms: unrepentant, obdurate, unpersuaded, unconverted, impenitent, cussed, obstinate, unregenerated, mulish, pigheaded, contrarious, dogged
Antonyms: docile, regenerate