Use 'expiate' to express sincere remorse or regret over one's misdoings or negligence. After realizing the impact of his words, he sought to expiate his harsh remarks with a heartfelt apology.
Pro Tip 2/3
Active Redemption
'Expiate' involves an active effort to seek forgiveness or make amends, not just feeling sorry. She volunteered every weekend to expiate her lack of involvement in the community.
Pro Tip 3/3
Remedy Wrongdoing
'Expiate' suggests a concrete action or sacrifice to compensate for wrongdoing. The CEO cut his own salary to expiate the company's environmental damages.