Which alone spreadeth out
natah (naw-taw')
to stretch or spread out; by implication, to bend away (including moral deflection); used in a great variety of application (out), stretch (forth, out), take (aside), turn (aside, away), wrest, cause to yield.
the heavens
shamayim (shaw-mah'-yim)
air, astrologer, heaven(-s).
and treadeth
darak (daw-rak')
to tread; by implication, to walk; also to string a bow (by treading on it in bending) -- archer, bend, come, draw, go (over), guide, lead (forth), thresh, tread (down), walk.
upon the waves
bamah (bam-maw')
an elevation -- height, high place, wave.
of the sea
yam (yawm)
from an unused root meaning to roar -- sea (-faring man, (-shore), south, west (-ern, side, -ward).