《说文》认为“柔”从矛声。但是,有学者认为柔、矛声母不类,《说文》将其分析为形声字不确。但是,出土文献中矛与柔相通、异文的例子可以证明《说文》的分析不误。通过对出土文献和传世文献中泥母与明母相通、异文、谐声、异读等材料的研究,可以看出泥母与明母在上古的交替可能与三等介音或高元音韵部有关。 “Said the text” that “soft ” from the spear. However, some scholars think that soft and spear are not the same, “Shuo Wen” analyzes it as the soundtrack is not clear. However, the unearthed literature spear and soft interlinked, examples of foreign language can prove that “Shuo Wen” analysis correct. Through the study of the unearthed literature and the literature of the Mud Mother and the Ming mother, different language, harmonic sound, different reading material, we can see that the alternate mother and mother Ming in the ancient may be related to the third or higher vowel rhyme .