/ɪˈfɛktɪvnəs/ – noun
Definition: 1. tính hiệu quả;
2. sự bắt đầu có hiệu lực.
A more thorough explanation: Effectiveness refers to the degree to which something is successful in producing a desired result or achieving a specific goal. In a legal context, effectiveness may refer to the ability of a law, regulation, contract, or other legal instrument to achieve its intended purpose or to have the desired impact on individuals, organizations, or society as a whole.
Example: The effectiveness of the new legislation in reducing crime rates will be closely monitored by law enforcement agencies.