一切經音義 3.15

3.15

惽沉（上呼昆反孔注尚書惽亂也廣雅癡也說文從民避廟諱改民為氏或從心惛下眠字准此）。

惽沉 (torpor; the former is hu/kun fan; Kong's commentary on the Book of Documents says 惽 means 'disordered'; Guangya says 'confused'; Shuowen jiezi says it is derived from 民, but to avoid the imperial taboo name, 民 was changed to 氏, or written with radical 心 as 惛; the character 眠 below follows this principle).