/ˈhaɪnəs/ – noun
Definition: điện hạ, hoàng thân, hoàng tử, công chúa.
A more thorough explanation: In legal English, the term “Highness” is a title of honor used to address or refer to certain members of royalty or nobility, such as princes, princesses, dukes, and duchesses. It is a formal way of showing respect and acknowledging their status and rank in society.
Example: Her Royal Highness, the Duchess of Cambridge, attended the charity event last night.