/ˈprɪzən bɒks/ – Phrase
Definition: phòng biệt giam.
A more thorough explanation: A “prison box” typically refers to a small, confined space within a prison facility where inmates may be temporarily held for disciplinary reasons or for security purposes. It is a secure area used to isolate and control inmates who may pose a threat to themselves, others, or the security of the facility.
Example: The defendant was placed in a prison box during the court proceedings for security reasons.