/ˈɪnsɛst/ – Noun
Definition: sự loạn luân.
A more thorough explanation: Incest is a legal term that refers to sexual relations or marriage between individuals who are closely related by blood, such as siblings, parents and children, or other close relatives. In many jurisdictions, incest is considered a criminal offense due to the potential harm it can cause to individuals and families, as well as the increased risk of genetic disorders in offspring resulting from close blood relations.
Example: The court sentenced the defendant to prison after he was found guilty of committing incest with his sister.