The teacher describing a student as an animal by way of comparison regarding his lack of understanding

Question:
He says: Honorable Shaykh, may Allah grant you success, I am a teacher in a private school, and sometimes the students tire me out, either by not understanding or because of bad manners, so I am forced to tell a student that he is an animal. I do not mean by this word that he is actually an animal, but rather I am comparing him to an animal in his lack of understanding. Is this permissible?

Answer:
No, you are a teacher who educates students, so how can you respond to something that is not good by educating them to curse? This is not permissible. Speak to them with good words, even if you were not a teacher, how much more so when you are a teacher? The teacher is an educator, so do not educate them with such methods. Yes, and you must be patient. It is inevitable that some of the students will commit some transgressions, so be patient.

The presenter:
Yes.