The word 'heinous' isn't just a synonym for 'bad' or 'wrong'. It's reserved for actions that go far beyond simple wrongdoing. Think of it as a label for behaviour that is profoundly immoral and repulsive to a universal sense of decency.

This term is often used in legal and ethical contexts to describe the most serious types of crimes, such as mass murder, torture, or crimes against humanity. The key element is the shocking nature of the act. It's an action so reprehensible that it violates our fundamental understanding of right and wrong.

So, while a simple theft is a crime, it wouldn't be described as heinous. The word is reserved for the most extreme violations of morality.