/tu swɛr əˈliːdʒəns/ – Phrase
Definition: thề chung thủy, trung thành.
A more thorough explanation: “To swear allegiance” means to make a formal, binding commitment to be loyal and faithful to a person, organization, or country, typically by taking an oath or making a solemn declaration of loyalty and support.
Example: In order to become a naturalized citizen, you must swear allegiance to the country and uphold its laws.