Jisho

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Noun, Noun which may take the genitive case particle 'no'
1. swift current; rapids
Wikipedia definition
2. RapidA rapid is a section of a river where the river bed has a relatively steep gradient causing an increase in water velocity and turbulence. A rapid is a hydrological feature between a run (a smoothly flowing part of a stream) and a cascade. A rapid is characterised by the river becoming shallower and having some rocks exposed above the flow surface.
Read “Rapid” on English Wikipedia
Read “急流” on Japanese Wikipedia
Read “Rapid” on DBpedia

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