The Vietnamese word "bắt giam" means to put someone in prison or to imprison someone. It is commonly used in legal contexts when someone is detained by authorities and taken to jail.
Cảnh sát đã bắt giam nghi phạm.
(The police have detained the suspect.)
Người đó bị bắt giam vì tội ăn cắp.
(That person was imprisoned for theft.)
While "bắt giam" specifically refers to the act of imprisoning someone, it can also imply a broader sense of confinement or detention in certain contexts.