C2 adjective /ˌʌn.rɪˈdʒɛn.ər.ət/
unregenerate
widerstandsfähig
Meaning
Not reformed or showing no signs of change; stubbornly refusing to reform or repent.
Example
He remained an unregenerate opponent of progress.
Er blieb ein unnachgiebiger Gegner des Fortschritts.