This is the 186th most frequent Romanian word.
niciun
"Niciun" means "no" or "not any" in English, used to indicate the absence of a singular masculine noun.
Here, 'niciun' is used to negate the presence of 'any article' in the context of what was read.
Nu am citit niciun articol ieri.
I didn't read any article yesterday.
In this sentence, 'niciun' conveys that there is an absolute absence of children failing to attend the activity.
Niciun copil nu lipsește de la activitate.
No child is absent from the activity.
'Niciun' in this context intensifies the negation of 'any reason' to justify the action of changing plans.