Hast thou entered
bow' (bo)
to go or come (in a wide variety of applications)
into the springs
nebek (nay'-bek)
a fountain -- spring.
of the sea
yam (yawm)
from an unused root meaning to roar -- sea (-faring man, (-shore), south, west (-ern, side, -ward).
or hast thou walked
halak (haw-lak')
to walk (in a great variety of applications, literally and figuratively)
in the search
cheqer (khay'-ker)
examination, enumeration, deliberation -- finding out, number, (un-)search(-able, -ed, out, -ing).
of the depth
thowm (teh-home')
an abyss (as a surging mass of water), especially the deep (the main sea or the subterranean water-supply) -- deep (place), depth.