the process of rocks breaking down or decomposing due to long-term exposure to the sun, air, water, or living things; wind erosion

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 xiāo​huà plus this word for "digestion"

the spontaneous loss of water by a hydrated salt upon exposure to air, resulting in the formation of a powdery deposit on its surface

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 xiāo​huà plus this word for "digestion"