The word 周围 is formed by combining two characters, 周 and 围, which both independently contain the core idea of encircling or surrounding. 周 conveys the sense of completeness, circumference, and all around, while 围 explicitly depicts enclosure or that which forms a circle or boundary. Together, they create a reinforced, holistic concept of the entire area that encloses a central point, the "surroundings" in every direction.