Continuation of the explanation of the words of Ibn Malik (may Allah have mercy on him): "What takes the place of a verb, like *shatan* and *sah* *** is a verbal noun, and likewise *awh* and *mah*."

The Shaykh : One says *awh* ... *awwah* ... its original form is *awh* ... one expresses pain, okay, what about *mah*? *Mah* means "stop," stop doing this thing, that is its meaning, okay, the author (may Allah have mercy on him) said: "like *shatan* and *sah*", *shatan* is past tense, and *sah* is imperative, and *awh*.
The student: For the present tense.

The Shaykh : For the present tense, and *mah* is imperative, is that right?
The student: Yes.

The Shaykh : Very well.
The student: What does *mah* mean?

The Shaykh : Huh?
The student: *Mah*?

The Shaykh : *Mah* means "stop," if you see someone messing around while the lesson is in progress, you say to him: *Mah*, meaning stop messing around.