A repercussion is an effect or consequence that follows from an action, decision, or event. It usually has a negative connotation, indicating that the consequence is undesirable, unexpected, or unintended.
For example, the repercussions of a bad investment decision could be financial losses, or the repercussions of a company's unethical behavior could be loss of public trust and reputation. The word "repercussion" can also be used to describe the reverberating or ongoing impact of an event, as in "the repercussions of the pandemic are still being felt around the world."