abluvion
n. C2 Proficiency ablu·vion
n. a very large amount of water, especially when it is moving or flooding. It is an old word that people rarely use today.
n. an overwhelming or excessive quantity of water, particularly in the context of flooding or deluge.
The valley was in abluvion after the heavy rains.
The ancient city was eventually abandoned after a sudden abluvion from the melting glaciers destroyed the lower districts.
The poet describes the river as a force of abluvion, sweeping away the remnants of the old world and leaving only a muddy plain in its wake.
From Late Latin abluvio. See abluent.