/ɪˈfɛktɪv/ – adj
Definition: 1. có hiệu lực, có tác dụng, có hiệu quả;
2. gây ấn tượng, có thực, hiện hữu.
A more thorough explanation: In legal terms, “effective” refers to something that is in force or operation, producing the intended or desired result, or legally valid and binding.
Example: The new contract will become effective on January 1st, 2022.