The antonyms for the phrase "lets run over" are "stop," "halt," "pause," "cease," and "finish." These words imply a complete break in motion or activity, indicating that the action of running over has come to a complete stop. These antonyms can be used in a variety of situations, such as in sports, construction, or even cooking. For example, if a soccer player is dribbling the ball towards the goal, but suddenly stops, the coach might say "Stop! Don't run over the ball!" Likewise, if a carpenter is cutting a piece of wood and needs to make adjustments, they might "pause" their saw to make those changes.