音學五書 yīnxuéwǔshū Five Books on Phonology Origin Definitions Defs Strokes Stroke Words Sentences Sents 音学 音學 yīnxué phonetics the branch of linguistics that deals with the physical sounds of human speech五 wǔ numeral five the number five; 5书 書 shū noun book book; volumes or works of text or drawings bound together