Tehoum is the projection of Tohu ("without form") into biological existence (Mem).
deep, depths, deep places, abyss, the deep, sea deep (of subterranean waters) deep, sea, abysses (of sea) primeval ocean, deep deep, depth (of river) abyss, the grave
Ge 8:2 The fountains also of the deep and the windows of heaven were stopped, and the rain from heaven was restrained
Job 38:16 Hast thou entered into the springs of the sea? or hast thou walked in the search of the depth?