nadir   (Sound)

The nadir has 2 Senses.

• low-water mark, nadir
• 最下点
• an extreme state of adversity; the lowest point of anything
• 逆境の極限状態

• nadir
• 天底
• the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected
• 観測者より下にある点で、天体が投影されているように見える仮想球の天頂の正反対にある