This is the 4th most frequent Hungarian word.
nem
"Nem" means "no" or "not" in English.
Here, 'nem' is used to negate the verb 'szeretem' (I like), indicating the opposite meaning: 'I don't like.'
Nem szeretem az esőt.
I don't like the rain.
The first 'nem' serves as a standalone negation equivalent to 'no,' while the second 'nem' negates the verb 'láttam' (I have seen).
Nem, nem láttam még.
No, I haven't seen it yet.
In this sentence, 'nem' is used to negate the noun phrase 'tanár' (a teacher), contrasting it with the correct role 'diák' (a student).