This is the 952nd most frequent Czech word.
nesmí
"Must not" or "is not allowed to."
The word 'nesmí' is used to indicate a prohibition for the subject.
On nesmí kouřit v této místnosti.
He is not allowed to smoke in this room.
The word 'nesmí' indicates a rule or law preventing an action.
Tento software nesmí být upravován.
This software must not be modified.
The word 'nesmí' denotes a general prohibition applying to all.