This is the 205th most frequent Czech word.
nemůže
"Nemůže" means "cannot" or "is not able to" in English.
The word 'nemůže' is used here to indicate inability due to circumstances (sickness).
Nemůže přijít, protože je nemocný.
He cannot come because he is sick.
The word 'nemůže' expresses impossibility as a result of mechanical failure.
To auto se porouchalo, takže teď nemůže jezdit.
The car broke down, so it cannot drive now.
The word 'nemůže' indicates incapacity related to lack of sufficient arguments.