rapids
nounUK /ˈræpɪdz/
US /ˈræpɪdz/
Rapids are fast, bumpy parts of a river where the water rushes over rocks.
The canoe bounced over the rapids and splashed everyone inside.
OTHER MEANINGS
2. A section of a river where the current is very swift because of a steep drop or many rocks.
The guide warned us about the dangerous rapids ahead.
3. Plural of rapid, meaning a fast-moving part of a stream.
Salmon swim up the rapids to reach their spawning grounds.
4. Swift, turbulent water in general, often used in geography.
The map marked the rapids in red so boaters would be careful.