a formal or public rejection of something
renunciation - rejection
A’renunciation' is a formal announcement made by a person or group to state that they no longer support, own, are connected to, or believe in something. It is almost always a public declaration and can be seen as a brave move or a cowardly one depending on the situation.
The politician’s renunciation of her past statements were seen as an act of submission made due to fear of not being seen as being politically correct.
Our CEO’s unequivocal renunciation of corrupt practices within the organization was a brave move and a sign of her integrity.
We will only engage in peace talks with that terrorist group once they make a renunciation of violence.