nadir

noun

The lowest point in the fortunes of a person or organization. noun
After the scandal, the company's reputation reached its nadir.
His career hit its nadir when he was fired from his job.
In astronomy, the point on the celestial sphere directly below an observer, opposite the zenith. noun
The star was at its nadir, invisible from our location.
When the sun is at its nadir, it is midnight in solar time.

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