造山作用 zàoshānzuòyòng orogeny Origin Definitions Defs Strokes Stroke Words Sentences Sents 造山 zàoshān mountain building mountain building or orogenesis in geology作用 zuòyòng noun function the natural purpose or activity of something, such as a biological or chemical process; often used as a suffix to mean "-ation" or "-ing" as in 消化 xiāohuà plus this word for "digestion"