Hai Collection, Lower Volume Radical: Tooth (chǐ) Page 1532, Entry 26 According to the Extensive Rhymes (Guangyun), it is pronounced ya. According to the Collected Rhymes (Jiyun), it is pronounced ya. In the Jade Chapters (Yupian), it is defined as teeth that are not even. Also, according to the Collected Rhymes (Jiyun), it refers to teeth that are not aligned. To refuse to listen to what others say is called ao-ya. In the History of the Tang (Tangshu), biography of Yuan Jie: Capable of learning to be stubborn and unresponsive, thus preserving the ancestral line and the whole family. Also, according to the Collected Rhymes (Jiyun), it is pronounced ya. It refers to teeth that do not meet properly.