The term 'locked up' can be used to describe a variety of situations in which someone or something is prevented from leaving or being accessed. This can include being SECURE, CAPTIVE, CONFINED, JAILED, CAGED, pent, sewn, SHUT, onice, sewed, injail, unfree, ASSURED, inprison, and behindbars. For example, someone might be 'SECURE' if they are kept safe from harm or danger, while someone might be 'CAPTIVE' if they are held against their will. Similarly, someone might be 'CONFINED' if they are restricted to a certain area, while someone might be 'JAILED' if they are held in a prison or correctional facility. Additionally, someone might be 'CAGED' if they are kept in an enclosed space, while someone might be 'pent' if they are kept in a CONFINED area. Furthermore, someone might be 'sewn' if they are kept in a tightly closed space, while someone might be 'SHUT' if they are prevented from leaving or accessing something. Additionally, someone might be 'onice' if they are kept in a frozen state, while someone might be 'sewed' if they are kept in a tightly closed space. Moreover, someone might be 'injail' if they are held in a prison or correctional facility, while someone might be 'unfree' if they are not allowed to move freely. Additionally, someone might be 'ASSURED' if they are kept safe from harm or danger, while someone might be 'inprison' if they are held in a prison or correctional facility. Finally, someone might be 'behindbars' if they are held in a prison or correctional facility.