Bottomless pit (archaic)

Usage examples of abysm.

Then, as I playfully shook him and turned him around, I felt the strangling tendrils of a cancerous horror whose roots reached into illimitable pasts and fathomless abysms of the night that broods beyond time.

THE COSMIC CALENDAR What seest thou else In the dark backward and abysm of time?

That primal and interior something in man, in his soul’s abysms, coloring all, and, by exceptional fruitions, giving the last majesty to him -- something continually touch’d upon and attain’d by the old poems and ballads of feudalism, and often the principal foundation of them -- modern science and democracy appear to be endangering, perhaps eliminating.

Think on that, Unbeliever"-he invested the title with abysms of contempt-"if you require to know where you are.

Here, the questions exfoliated, so to speak, into innumerable enigmas, abyss opened at the bottom of abysm, and Marius could no longer bend over Jean Valjean without dizziness.