He continued to smoke unregenerately despite the health risks.

He remained unregenerate despite numerous attempts to change his ways.

Her unregenerateness was evident in her refusal to change her ways.

The old car was unregenerated and in need of repair.

The unregeneration of the city's infrastructure has led to numerous problems.

The damage to the environment caused by the oil spill is unregenerable.

She has an unregenerating spirit.