在苗瑶语的六种塞擦音中,齿/龈塞擦音为古苗瑶语原生音位,其他五种塞擦音都是后起的。后起塞擦音主要有三个来源:(1)复辅音声母耦化所形成的腭前塞擦音、边塞擦音与卷舌塞擦音;(2)齿/龈擦音、塞擦音演变所产生的齿沿塞擦音;(3)声母简化合并过程中所产生的龈后塞擦音。 Among the six kinds of affricates in Miao-Yao language, the tooth / gingival affricate is the native phoneme of Ancient Miao and Yao, and the other five kinds of affricative affixes are all from the beginning. There are three main sources of raucous rasping noise: (1) the palatal carapace, the parietal razor and the curled cambola formed by the consonant consonant; (2) the evolution of the tooth / The resulting tooth along the rasp sound; (3) Initial consonant simplified merger resulting from the perianal bugle sound.