細さい流りゅうさいりゅうMeanings1nounsmall stream; rivulet; brookletRefers to a very small, narrow natural watercourse. Often used in literary or descriptive contexts.山やま道みちを歩あるいていると、細さい流りゅうのせせらぎが聞きこえた。While walking along the mountain path, I heard the murmur of a small stream.