Elev og lærer
The appropriate antonym applicable for pupil is teacher.
professeur
l'enseignant!!
To say "the teacher is friendly" in French, you would say "le professeur est sympathique."
No they cant
the teacher chair is called 'la chaise du professeur' in French.
un mauvais professeur
a music teacher is un / une professeur de musique in French.
"enseignante"
l'enseignant(e) a....
mme.
To say "Yes, you are a teacher" in French, you would say "Oui, vous êtes un professeur."