A large waterfall or cataract, especially one that is violent and destructive.
From Greek 'kata' (down) + 'dupe' (water), describing the violent downward rush of water over a cliff.
This is an archaic word that fell out of use, but it shows how English borrowed from Greek to describe nature's dramatic moments—the word itself sounds like the rushing roar of water!
Complete word intelligence in one call. Free tier — 50 lookups/day.