Radical ⽏ (80)

Zhanguo (Chu)	Zhanguo (Chu)	Qin	Qin	W.Han	E.Han	Tang	Ming
清五.命訓4 [母]	上三.彭祖8	嶽三68	睡.日乙144	北.老7	中國文物報1993.11	五經文字	字彙

{毋} *m[o] “do not”

Differentiated form of 母 *MƏ.

• 季旭昇 2014 - 說文新證 [2nd ed.] (854)

{母} *mˤəʔ “mother” & {女} *nraʔ “woman”

女 + differentiative dots. Initially, like 女, it was used for both words {女} and {母}. Later it began to be used only for {母}.

• 季旭昇 2014 - 說文新證 [2nd ed.] (851)
• 姚孝遂 1989 - 再論古漢字的性質
• 劉釗 2011 - 古文字構形學 [2nd ed.] (27-28)
• 黃德寬 2014 - 古漢字發展論 (107-108)