shamayim (Hebrew #8064)
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)
KJV usage: air, X astrologer, heaven(-s).
Pronounce: shaw-mah'-yim
Origin: dual of an unused singular shameh {shaw-meh'}