He opened
pathach (paw-thakh')
to open wide; specifically, to loosen, begin, plough, carve
the rock
tsuwr (tsoor)
a cliff (or sharp rock, as compressed); generally, a rock or boulder; figuratively, a refuge; also an edge (as precipitous)
and the waters
mayim (mah'-yim)
water; figuratively, juice; by euphemism, urine, semen -- + piss, wasting, water(-ing, (-course, -flood, -spring).
gushed out
zuwb (zoob)
to flow freely (as water), i.e. (specifically) to have a (sexual) flux; figuratively, to waste away; also to overflow -- flow, gush out, have a (running) issue, pine away, run.
they ran
halak (haw-lak')
to walk (in a great variety of applications, literally and figuratively)
in the dry places
tsiyah (tsee-yaw')
aridity; concretely, a desert -- barren, drought, dry (land, place), solitary place, wilderness.
like a river
nahar (naw-hawr')
a stream (including the sea; expec. the Nile, Euphrates, etc.); figuratively, prosperity -- flood, river.