Where does “maH” come from?

maH (Proto-Indo-Aryan) comes from Proto-Indo-Iranian maH, from Proto-Indo-European meh₁ — prohibitive particle.

Ancestry of “maH”, step by step

StepLanguageWordMeaning
1Proto-Indo-IranianmaHdo not; prohibitive particle
2Proto-Indo-Europeanmeh₁prohibitive particle
Every word from Proto-Indo-European meh₁ →Every word from Proto-Indo-Iranian maH →