元音變化 yuányīnbiànhuà vowel mutation Origin Definitions Defs Strokes Stroke Words Sentences Sents 元音 yuányīn vowel A speech sound produced by the vocal cords vibrating while the air flows through the mouth and throat without being blocked; also called 母音 mǔyīn.变化 變化 biànhuà nounverb change change; variation; transformation; to change, vary, or transform