nadir

باللغة العربية: نَظِير

1. The point of the celestial sphere, directly opposite the zenith; inferior pole of the horizon; point of the celestial sphere directly under the place of observation.
2. The lowest point; time of greatest depression. (figuratively) · Near-synonym: dead
3. The axis of a projected conical shadow; the direction of the force of gravity at a location; down. · The nadir of the sun is the axis of the shadow projected by the Earth.

الجمع nadirs