Zi Collection, Middle Volume Radical: Heart (xīn) Pronounced yu (rising tone) In the "Jiyun" (集韵), it is recorded as pronounced yu (rising tone), the same sound as yu. The "Shuowen Jiezi" (说文解字) explains it as meaning joy and happiness. The character is composed of the "Heart" radical (心), with "yu" (禺) as the phonetic component. In Zhuxu County (朱虚县) of Langya Commandery (琅邪郡), there is a place called Juting (㥥亭).