Continuation of the Explanation of Ibn Malik (may Allah have mercy on him): And this is the "ayha" that has come *** and the description of "ay" with anything other than this is rejected.

The Shaykh :"And this is the 'ayha' that has come":
He said: "And the description of 'ay' with anything other than this is rejected":
The description of "ay" with anything other than this is rejected: "This" refers to the aforementioned "ayha." How many things are there?
There are three things: the one with the definite article "al," the demonstrative pronoun, and the third is the relative pronoun with the definite article "al." So as for anything other than this, the author says: "And the description of 'ay' with anything other than this is rejected": meaning it is refused and not accepted.