/steɪt ˈsiːkrɪt/ – Phrase
Definition: bí mật quốc gia.
A more thorough explanation: A state secret is information that is deemed confidential and classified by a government for reasons of national security. Unauthorized disclosure of state secrets is typically prohibited by law in order to protect the interests of the state.
Example: The government refused to disclose the information, citing national security concerns and the need to protect state secrets.