Pronounced mo (falling tone) according to "Tang Yun" (Tang Yun), with the same pronunciation as "mao". "Shuowen Jiezi" explains it as the appearance of fine grass growing thickly. Also, "Yupian" (Yupian) notes the pronunciation as mo (falling tone) lao (falling tone), with the same pronunciation as "mao". The meaning is the same. "Jiyun" (Jiyun) records it as interchangeable with the character "mao".