What does "nadir" refer to?

The term "nadir" specifically refers to the lowest point in a situation or a person’s fortunes. It is often used in contexts such as emotional states, financial situations, or even celestial navigation, where it denotes the point directly opposite to the zenith or the highest point in the sky. Understanding "nadir" as the lowest point allows one to comprehend its use in various scenarios, especially when discussing challenges or setbacks, where it marks a significant low point before potential recovery or improvement. The other choices do not accurately reflect this meaning—terms for high points, turning points, or states of prosperity fundamentally convey different concepts and are not synonymous with "nadir."