Complex sentence: A brick is a block, or a single unit of a ceramic material used in masonry construction, usually stacked together, or laid using various kinds of mortar to hold the bricks together and make a permanent structure.
Split into simpler sentences: A brick is a block, or a single unit of a ceramic material used in masonry construction. Typically bricks are stacked together, or laid as brickwork using various kinds of mortar to hold the bricks together and make a permanent structure.