/tə rɪˈnaʊns əˈliːdʒəns/ – Phrase
Definition: từ bỏ quốc tịch.
A more thorough explanation: To renounce allegiance refers to the formal act of publicly declaring one’s intention to no longer be loyal or obedient to a particular country or government. This typically involves a formal renunciation of citizenship or nationality.
Example: John decided to renounce his allegiance to his home country and become a citizen of the new country he had moved to.