Antonyms for "take one's time" include "hurry," "rush," "speed up," "be quick," "act hastily," "move swiftly," "hasten," and "accelerate." These antonyms convey a sense of urgency and the need for quick action instead of taking one's time and proceeding at a leisurely pace. When you hurry, you often sacrifice quality for speed, while taking one's time ensures that you complete a task thoroughly and correctly. Therefore, the antonyms for "take one's time" are useful when time is of the essence, and quick action is required to complete a task on time.