The term 'blocks off' can be summarized by three crossword solutions: BARS, BARRICADES, and DAMS. Bars are typically made of metal or wood and are used to block off an area, such as a door or window. Barricades are structures that are used to block off a road or path, usually made of wood, metal, or concrete. DAMS are structures built across rivers or streams to control the flow of water and are often used to create reservoirs or to prevent flooding. All three of these solutions can be used to block off an area or path.