Mao Collection, Upper Volume. Radical: Heart (xīn). Kangxi stroke count: 17. Page 405, Entry 11.
Pronounced juan (falling tone). As defined in the Erya (Tangyun) and Collected Rhymes (Jiyun), the sound is juan. According to the Explaining Graphs and Analyzing Characters (Shuowen), it means urgent or hasty. Formed from the radical Heart and the phonetic element huan.
Also, according to the Collected Rhymes (Jiyun), pronounced ban (level tone). It describes a perverse or contrary nature.
Also, pronounced huan (level tone). It describes a quick or sharp manner.
As seen in the Book of Master Zhuang (Zhuangzi), in the chapter Lie Yukou: To follow the hasty and reach understanding.
Also, according to the Collected Rhymes (Jiyun) and the Rectified Rhymes (Zhengyun), pronounced xuan (level tone). The meaning is the same.