unregenerating
/(ˌ)ʌnrɪˈdʒɛnəreɪtɪŋ/adjective
1That does not regenerate or reform someone or something. Now rare.
2Chiefly Science. That is not undergoing regeneration, renewal, or recreation.
Origin
Mid 17th century; earliest use found in Thomas Reeve (?1594–1672), Church of England clergyman. From un- + regenerating.