冲积土 chōngjītǔ alluvial soil Origin Definitions Defs Strokes Stroke Words Sentences Sents 冲积 沖積 chōngjī alluviate; alluviation to wash down and deposit sand, gravel, or soil in low-lying areas via water flow; the process or result of such deposition土 tǔ noun soil soil; earth; dirt; clay