nadir

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. an extreme state of adversity;
the lowest point of anything (Freq. 2)
• Syn:
low-water mark
• Hypernyms:
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
• Ant:
zenith
• Hypernyms:
celestial point
• Part Holonyms:
celestial sphere, sphere, empyrean, firmament, heavens,
vault of heaven, welkin