/ˌæmbəˈsædər ɪkˌstrɔrdəˈnɛri ənd ˌplɛnɪpəˈtɛnʃəri/ – Pharse
Definition: đại sứ đặc mệnh toàn quyền.
A more thorough explanation: An ambassador extraordinary and plenipotentiary is a high-ranking diplomat appointed by a government to represent it in dealings with another country. This type of ambassador has full authority to negotiate and sign treaties and agreements on behalf of their government.
Example: The President appointed John Smith as the ambassador extraordinary and plenipotentiary to represent the country in diplomatic negotiations with the neighboring nation.