/ˈnæʧrəlaɪzˈ/ – Verb
Definition: nhập quốc tịch, cho nhập quốc tịch.
A more thorough explanation: To naturalize means to grant citizenship to a foreign national, allowing them to become a citizen of a country where they were not born.
Example: After living in the country for five years, she decided to apply to naturalize as a citizen.