This is the 320th most frequent Serbian word.
зна
"Зна" means "knows."
The word 'зна' is used here to indicate possession of knowledge or skill.
Он зна као нико други.
He knows like no other.
In this sentence, 'зна' introduces a question about awareness or knowledge.
Зна ли она шта се десило?
Does she know what happened?
Here, 'зна' expresses the fact of having information or being aware.