abyss

uh-BISS

meaning in plain English

A very deep hole or space that seems to have no bottom, like a bottomless pit.

Picture staring into a dark abyss, like a bottomless pit that swallows a dropped marble forever.

for example

He stared into the dark abyss, feeling like he was falling forever.

Have you ever stared into a dark basement stairwell at night, where the light above fades into black before you can see the bottom? That uneasy pull you feel—the way it seems to swallow everything—is the abyss whispering that some depths aren’t meant to be measured.