And in that day
yowm  (yome)
a day (as the warm hours),
they shall roar
naham  (naw-ham')
to growl -- mourn, roar(-ing).
against them like the roaring
nhamah  (neh-haw-maw')
snarling -- disquietness, roaring.
of the sea
yam  (yawm)
from an unused root meaning to roar -- sea (-faring man, (-shore), south, west (-ern, side, -ward).
and if one look
nabat  (naw-bat')
to scan, i.e. look intently at; by implication, to regard with pleasure, favor or care -- (cause to) behold, consider, look (down), regard, have respect, see.
unto the land
'erets  (eh'-rets)
the earth (at large, or partitively a land) -- common, country, earth, field, ground, land, natins, way, + wilderness, world.
behold darkness
choshek  (kho-shek')
the dark; hence (literally) darkness; figuratively, misery, destruction, death, ignorance, sorrow, wickedness -- dark(-ness), night, obscurity.
and sorrow
tsar  (tsar)
adversary, afflicted(-tion), anguish, close, distress, enemy, flint, foe, narrow, small, sorrow, strait, tribulation, trouble.
and the light
'owr  (ore)
illumination or (concrete) luminary (in every sense, including lightning, happiness, etc.) -- bright, clear, + day, light (-ning), morning, sun.
is darkened
chashak  (khaw-shak')
to be dark (as withholding light); transitively, to darken -- be black, be (make) dark, darken, cause darkness, be dim, hide.
in the heavens
`ariyph  (aw-reef')
the sky (as dropping at the horizon) -- heaven.