At last, her shot being all expended, the child stood still and gazed at Hester, with that little laughing image of a fiend peeping out—or, whether it peeped or no, her mother so imagined it—from the unsearchable abyss of her black eyes.
"I do forgive you, Hester," replied the minister at length, with a deep utterance, out of an abyss of sadness, but no anger.
There are no more uses of "abyss" in the book.
Show samples from other sources
These were men who had built up wealth and social status over long careers and now found themselves looking into the abyss. [of the 1987 stock market crash]
Alan Greenspan -- The Age of Turbulence
The nerve-grinding squeal of the spike cutting through the ground sent a shiver up Thomas’s spine, though a second later the Griever tumbled into the abyss.