Leaching is a process in which a liquid, such as water, passes through a material to dissolve and extract certain components. OOZE is a four-letter word that is used to describe the slow, steady flow of a liquid, such as water, through a porous material. This process is often used in agriculture to extract nutrients from soil, and it is also used in mining to extract minerals from ore. Leaching is an important part of many industrial processes, and it is also used to purify water.