The word 平静 is formed by combining two independent characters, each contributing a layer of meaning to create a unified concept. The first character, 平 (píng), carries the core idea of being flat, level, or even, suggesting a state without bumps or disturbances. The second character, 静 (jìng), conveys the essence of stillness, quiet, and absence of movement or noise. When placed together, they do not simply list attributes but fuse into a single, profound notion: the "level-stillness" or "even-quiet" that perfectly encapsulates a deep, undisturbed calm, both externally in one's surroundings and internally in one's mind.