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abyss

/əˈbɪs/ noun

In Latin: profundum, abyssus, barāthrum Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about abyss at Wordnik → Where our words come from →

  1. A bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively).

Origin

From Middle English abissus, from Late Latin abyssus (“a bottomless gulf”), from Ancient Greek ἄβυσσος (ábussos, “bottomless”, from ἀ- (a-, “not”) + βυσσός (bussós, “deep place”)), from βυθός (buthós, “deep place”). Displaced native Old English neowolnes.

From Wiktionary, via Kaikki.org (CC BY-SA)