One of the three characters (無／无, 无, 亡) that have historically been used to represent the word "no, not any". First attested in the Warring States period; used interchangeably with 無／无 until the Tang dynasty. Readopted by the PRC in 1956.
The origin of this character is unknown. Probably an ancient variant form of either 元(yuán), 天(tiān) or 堯／尧(yáo). This character must not be confused with 旡.