The word 清洁 (qīngjié), meaning "clean", is formed through a classic Chinese compositional logic where two independent characters with closely related meanings are combined to create a single, reinforced concept. The first character, 清 (qīng), originally depicts water that is clear and pure, evoking a sense of transparency and freshness. The second, 洁 (jié), carries the core idea of being pristine, unblemished, and free from impurity. By placing them side-by-side, the compound word merges the imagery of pristine clarity (清) with the state of being spotlessly pure (洁), resulting in a holistic and intensified notion of cleanliness that encompasses both visual and moral purity.