Malum in se is a Latin term that refers to acts that are inherently evil or wrong, regardless of whether they are legally prohibited or not. There are several synonyms that can be used to describe such acts, including intrinsically evil, inherently immoral, fundamentally wicked, and inherently sinful. These terms indicate that certain actions are morally reprehensible in and of themselves, without any external factors or legal considerations. Some examples of malum in se acts include murder, theft, and rape. These synonyms highlight the importance of recognizing the fundamental ethical principles that underlie these acts and the harm they cause to individuals and society as a whole.