半元音 bànyuányīn semivowel Definitions Defs Origin Strokes Stroke Words Sentences Sents 半 bàn numeral half one half; semi-; specifically used after a number and a measure word to mean "and a half"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.