Immurement
Immurement (from Latin im- "in" and mūrus "wall"; literally "walling in") is a form of imprisonment, usually for life, in which a person is placed within an enclosed space with no exits. This includes instances where people have been enclosed in extremely tight confinement, such as within a coffin. When used as a means of execution, the prisoner is simply left to die from starvation or dehydration. This form of execution is distinct from being buried alive, in which the victim typically dies of asphyxiation.