The word nadir means the point directly below a particular location or observer, opposite to the zenith in astronomy. It refers to the direction pointing straight down from a specific spot, often used to describe the lowest point of a celestial object along its path. Figuratively, it is also used to signify the lowest or worst point in a situation, such as the lowest point in someone's life, career, or an event's quality. The term comes from the Arabic word "nazir," meaning "opposite to".
