Pronounced ěr (falling tone) according to "Guangyun", and rěn ěr (falling tone) according to "Jiyun", "Yunhui", and "Zhengyun", with the same pronunciation as "ěr". "Yupian" explains it as the appearance of flourishing horse reins. "Jiyun" states that this character is interchangeable with the character "ěr".