The term 'UNDOING OF LEGISLATION' can be summarized as the REPEAL of a law or set of laws. This is the process of removing or reversing a law that has been previously enacted. It is usually done by the legislative body that originally passed the law, but it can also be done by a higher authority such as a court or executive branch. The term 'REPEAL' is used to describe this process, which is composed of six letters.