Atoning for is an act of making amends or reconciling for a wrong or mistake. The opposite of atoning for would be denying or ignoring the wrongdoing, disregarding accountability or responsibility for the wrong committed. Another antonym for atoning for would be repeating the mistake or committing further wrong rather than seeking to correct and make amends for it. It could also imply justifying or excusing oneself for the wrongdoing and not feeling any remorse or guilt for the harm caused. Overall, antonyms for atoning for are anything that defies justice, accountability, and the willingness to set things right.