A bottomless pit is an example of an abyss.
A person who is very depressed may be said to have fallen into an abyss.
Abyss of shame, of time, etc.
Origin of abyss
- Middle English abissus from Late Latin abyssus from Greek abussos bottomless a- without a–1 bussos bottom
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English abissus, from Late Latin abyssus (“a bottomless gulf”), from Ancient Greek ἄβυσσος (abussos, “bottomless”), from ἀ- (a-, “not”)+ βυσσός (bussos, “deep place”),, from βυθός (bythos, “deep place”).