This is the 3290th most frequent Russian word.
отказа
"Отказа" means "refusal" or "rejection" in English.
In this sentence, 'отказ' is used to describe a rejection or denial of a request or permission.
Он получил отказ от участия в соревнованиях.
He received a rejection from participating in the competitions.
Here, 'отказ' correlates with the stoppage or failure of a mechanism or system.
Система была защищена от отказа оборудования.
The system was protected against equipment failure.
In this context, 'отказ' refers to the act of declining to provide aid or assistance.