/nʌˈlɪti/ – Noun
Definition: 1. tính vụn vặt, hành vi vụn vặt;
2. tính vô hiệu lực, tính vô giá trị.
A more thorough explanation: Nullify means to make something legally void or invalid, especially by a formal declaration or legal action.
Example: The court declared the contract to be a nullity due to the lack of proper signatures from both parties.