expiate

He volunteered at the shelter to expiate his earlier selfishness.

The ruler tried to expiate years of cruelty by funding public schools.

“Years earlier, residents had suppressed smaller burns; some now treated restoration as a chance to expiate that error through patient stewardship.”
— from the passage The Patient Burn

“Silence settled before the mayor admitted that pride, not evidence, had governed the town’s response, and that replacing pipes alone could not expiate its wrongdoing.”
— from the passage The Case She Carried

“He did try to expiate the failure by recasting a smaller bell without wages, but that offer could not repair his ruined reputation.”
— from the passage The Fault in the Bronze