/nʌlɪfɪˈkeɪʃən/ – Noun
Definition: việc vô hiệu hóa, việc xóa bỏ.
A more thorough explanation: Nullification is a legal doctrine that allows a state to invalidate a federal law that the state deems unconstitutional. This concept is based on the idea that states have the right to refuse to enforce or comply with federal laws that they believe exceed the powers granted to the federal government by the Constitution.
Example: The court ruled that the contract was void due to the nullification of a key provision.