Be captured is a term that refers to being taken or held captive. There are a number of synonyms that can be used to describe this action, including seize, apprehend, detain, trap, ensnare, confine, restrain, and catch. Each of these words has a slightly different connotation, with seize implying a sudden and forceful taking, apprehend suggesting a legal or official capture, and ensnare implying a trap or trickery. Confine and restrain both suggest a limitation of movement, with confine suggesting a physical space and restrain implying some kind of physical or mental control. Ultimately, the choice of synonym will depend on the context of the situation and the intended meaning.