תְּהוֹם tᵉhôwm (H8415)

an abyss (as a surging mass of water), especially the deep (the main sea or the subterranean watersupply)

1) deep, depths, deep places, abyss, the deep, sea 1a) deep (of subterranean waters) 1b) deep, sea, abysses (of sea) 1c) primeval ocean, deep 1d) deep, depth (of river) 1e) abyss, the grave

or תְּהֹם; (usually feminine) from הוּם (H1949);