急きゅう流りゅう下くだりMeaningsNoun1. river raftingKanji used急hurry流current (in a fluid)下belowComposed of急きゅう流りゅうswift current; rapidsNoun下くだりdown-train; train heading toward the ending point of its route; down-slope; downward going; downbound (esp. away from Tokyo); downstream; downhillNoun