Old variant of ㄜ (around 1932)Old variant of ㄜ (around 1949)
In the late twenties or early thirties of the 20th century, it appeared as a simplification ofㄮ(ē), writing the dot and the second stoke of the bottom partㄛ(ō) with one stroke.ㄮ(ē) was itself derived fromㄛ(ō) in 1920, when a new allophone appeared, writing a dot to differentiate between them. The letterㄛ(ō) is itself derived from𠀀, inhalation, the reverse of丂(kǎo) and an ancient form of呵 (Mandarin:hē).
Derived fromㄛ(ō)(Mandarin:ō), which was derived from𠀀, inhalation, the reverse of丂(kǎo) and an ancient form of呵 (Mandarin:hē), becauseMandarin:ē is itsallophone in Standard Chinese.