[ˈneɪdɪə], (Noun)

Definitions:
- the lowest or most unsuccessful point in a situation
(e.g: asking that question was the nadir of my career)

- the point on the celestial sphere directly below an observer


Phrases:

Origin:
late Middle English (in nadir): via French from Arabic naẓīr (as-samt) ‘opposite (to the zenith)’