The antonyms for the term 'most approximal' would be 'farthest,' 'most distant,' 'remotest,' and 'furthest.' These words convey the concept of distance between two points or objects. When talking about the most approximal object, one means the object that is closest or nearest to another. On the other hand, words like 'farthest,' 'most distant,' 'remotest,' and 'furthest' indicate that an object or a place is located far away or has the maximum distance from the point of reference. Whether it is a physical distance or an emotional one, these antonyms convey the opposite of proximity and closeness.