정제 (Refinement) is the process of improving or purifying a substance or idea. In various fields, such as chemistry and manufacturing, refinement involves removing impurities or unwanted elements to enhance quality. For example, the refinement of crude oil results in products like gasoline and diesel. In a broader context, refinement can also refer to the enhancement of skills or concepts. This can involve revising a piece of writing or improving a technique in art or music. The goal is to achieve a higher level of excellence and clarity, making the final product more effective and appealing.