The opposite of nadir, it's from the Arabic for "road above"
The 
name... [DOC] [TLE] Zenith Star Open Sky Primero Ladies Pink Leather Watch ... [PAR] Aug 26, 2016 ... Zenith Zenith derived from Arabic samt ar ras the way or road above one's head 
... road compare Arabic samt ar r s road above over one's head the opposite of 
nadir ze ...