What is the term for the lowest point?

The term that denotes the lowest point is "nadir." In various contexts, such as astronomy, psychology, and more general usage, "nadir" represents the point directly below the observer or the lowest state in a given situation. For instance, in astronomy, it refers to the point in the sky that is opposite the zenith, which is the highest point. In a metaphorical sense, one might refer to a difficult period in life as a person's nadir, signaling a low or challenging moment. The other terms provided have distinct meanings: "malinger" refers to someone pretending to be ill to avoid duty, "officious" describes someone overly eager to offer unwanted help or advice, and "obviate" means to prevent or eliminate something. Each of these terms relates to different concepts, making "nadir" the only appropriate choice for indicating the lowest point.