nadir

If a highly forgetful person loses his phone, his wallet, and then his car keys in separate instances all in one day, you could say that he has reached an organizational nadir. This means “lowest point.”

This was originally strictly an astronomical term and is the opposite of the word zenith, which is the part of the sky located directly above a person’s head or, “high point.” In fact, nadir is derived from the Arabic nazir, which means “opposite to.” It is still used in astronomy to indicate the part of the celestial sphere located directly below an observer, but also more generally to describe the worst point of someone’s life or career.

Definitions of nadir
1

n an extreme state of adversity; the lowest point of anything

Synonyms:
low-water mark
Type of:
adversity, hard knocks, hardship
a state of misfortune or affliction

n the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected

Antonyms:
zenith
the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Type of:
celestial point
a point in the heavens (on the celestial sphere)

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