nadir
the lowest point
Root
- nadir / zenith: lowest point and highest point overhead
Other words with the nadir / zenith root
- zenith: the highest point
Nadir is the point below, opposite the high point overhead.
The scandal marked the nadir of his public life.
Pair it with zenith. Zenith is the high point overhead; nadir is the opposite direction, the low point beneath. That spatial contrast makes the emotional meaning easy: the worst point.