nadir
noun
[ ˈneɪdɪə ]
• the lowest or most unsuccessful point in a situation.
• "asking that question was the nadir of my career"
Similar:
the lowest point,
the all-time low,
the lowest level,
low-water mark,
the bottom,
as low as one can get,
rock-bottom,
the depths,
zero,
the pits,
• the point on the celestial sphere directly below an observer.
Origin:
late Middle English (in nadir (sense 2 of the noun)): via French from Arabic naẓīr (as-samt) ‘opposite (to the zenith)’.