Kataklusmos denotes the destructive inundation that came upon the ancient world in Noah's day.

The attested uses consistently refer to the inundation associated with Noah: it is anticipated as a period before it came, then described as coming upon and destroying those outside the ark, and as brought upon the ungodly world.

1. Noah-era destructive inundation · dominant

   In Matthew 24:38, the genitive singular form marks the days before the event, while Matthew 24:39 and Luke 17:27 use the nominative singular in clauses where it came and removed or destroyed all. In 2 Peter 2:5, the accusative singular occurs with the action of bringing it upon the world of the ungodly.

   Matthew 24:38Matthew 24:39Luke 17:272 Peter 2:5

In the Anselm Project Bible: Across all four verses, the APB presents the event as “the flood” or “a flood,” including its coming upon people or the ungodly world. These renderings confirm the verse-level presentation rather than isolate every contribution of the Greek form.