/tə bɪˈtreɪ ə ˈsiːkrɪt/ – Phrase
Definition: tiết lộ bí mật.
A more thorough explanation: To betray a secret means to disclose or reveal confidential information that was entrusted to one in confidence, thereby violating the trust placed in the person who shared the secret.
Example: The employee signed a confidentiality agreement promising not to betray any company secrets.