i don't know but you can go to outher web sites to see if they have the answer
The word "nadir" comes from Arabic "nadir," meaning "opposite." It was borrowed into English from Medieval Latin in the 14th century. In astronomy, nadir is the point on the celestial sphere opposite the zenith and directly below the observer.
Nadir
"Nadir" is the point below you - the point opposite to the zenith.
Nadir comes for the arabic nazir, meaning opposite. Nadir is the direction directly below a point. It is in a way the opposite to Zenith. The word is also used in the meaning of the lowest point.
The opposite of apex is antapex.(Nadir is the opposite of one use of apex, to mean zenith.)
The opposite of zenith (high point, apex) would be nadir(lowest point).Other possible antonyms would be minimum or bottom.In astronomical terms, the point in the sky that is directly over your head is the 'zenith'. The point in the sky that is directly between your feet and down through the Earth is the 'nadir'.
Nadir was Erik's friend from Persia.
nadar
Nadir Nadirov was born in 1932.
Nadir Lamyaghri was born in 1976.
Nadir D'Priest was born in 1961.
Nadir Benoufella was born in 1987.