The bottom is defined as the underside or lowest position.
The lowest point reached by anything
The end opposite the head, top, or front:
Anything opposed or opposite
The point of culmination; the peak:
Find another word for nadir. In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for nadir, like: lowest point, bottom, low-water mark, depth(s), foot, opposite, zenith and apogee.