nadir
n
1 point in the heavens directly beneath an observer 天底. Cf 参看 zenith.
2 (fig 比喻) lowest point; time of greatest depression, despair, etc 最低点; 最压抑、 消沉等的时刻
This failure was the nadir of her career. 这次失败是她事业上的低
After all, all living creatures live by feeding on something else, whether it be plant or animal, dead or alive, and it is only by chance that such a fate is avoided.