The word "吵杂" is formed by combining the character "吵", meaning noisy, which is composed of the radical "口" (mouth) indicating sound or speech and the component "少", with the character "杂", meaning mixed or disorderly, composed of "木" (wood) and "九" (nine). In this compound, "吵" directly conveys noise, while "杂" contributes the sense of disorder, together creating a meaning of chaotic noise.