Mid-point refers to the exact halfway point between two points, objects or numbers. However, the English language also offers a range of antonyms for the word midpoint. One such antonym could be 'extreme endpoint', which means beyond the midpoint or a point that is the farthest away from the midpoint. Another antonym could be 'beginning', which indicates the starting point of a journey, problem or process. Similarly, the word 'end' could be used as an antonym, representing the final point of a journey or process. Additionally, 'one-sidedness' could be an antonym, indicating a distinct bias towards one side, which is contrary to the impartiality of a midpoint.