8064  shamayim  shaw-mah'-
yim

 dual of an unused singular 
shameh {shaw-meh'}; from an 
unused root meaning to be 
lofty; the sky (as aloft; the 
dual perhaps alluding to the 
visible arch in which the 
clouds move, as well as to 
the higher ether where the 
celestial bodies revolve):--
air, X astrologer, heaven(-
s).