noun
nadir
NAY-deer/ˈneɪdɪr/
The lowest or worst point.
The red marble rests at the track's nadir.

Etymology
An astronomical lowest point transferred easily to the lowest or worst point generally.
More examples
- Morale reaches its nadir that winter.
- The defeat marks the nadir of his season.
Forms
nadir
Similar words
- low point
- A plain equivalent for the worst stage.
- rock bottom
- An informal expression for the lowest possible state.