nadir

Noun

1. an extreme state of adversity; the lowest point of anything
   • Synonyms
     • low-water mark
   • Less specific
     • adversity
     • hardship
     • hard knocks
2. 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
   • Less specific
     • celestial point
   • Part of
     • celestial sphere
     • sphere
     • empyrean
     • firmament
     • heavens
     • vault of heaven
     • welkin