Let us swallow them up
bala` (baw-lah')
to make away with (specifically by swallowing); generally, to destroy -- cover, destroy, devour, eat up, be at end, spend up, swallow down (up).
alive
chay (khah'-ee)
age, alive, appetite, (wild) beast, company, congregation, life(-time), live(-ly), living (creature, thing), maintenance, + merry, multitude, + (be) old, quick, raw, running, springing, troop.
as the grave
sh'owl (sheh-ole')
Hades or the world of the dead (as if a subterranean retreat), including its accessories and inmates -- grave, hell, pit.
and whole
tamiym (taw-meem')
without blemish, complete, full, perfect, sincerely (-ity), sound, without spot, undefiled, upright(-ly), whole.
as those that go down
yarad (yaw-rad')
to descend; causatively, to bring down (in all the above applications)
into the pit
bowr (bore)
a pit hole (especially one used as a cistern or a prison) -- cistern, dungeon, fountain, pit, well.