The opposite of "up-rises" can be described using words such as falls, descends, sinks, drops, or declines. When something "up-rises," it moves in an upward direction, becoming taller or higher. But when something "falls," it moves downwards in the opposite direction, becoming shorter or lower. Similarly, when something "descends," it moves downwards, following a path or trajectory. "Sinks" suggests a heavy or sudden drop, while "declines" indicates a gradual or steady decrease in height, position, or quality. These antonyms are a useful way to describe movement in the opposite direction to "up-rises.