This is the 1246th most frequent Russian word.
операция
"Operation" – an action, procedure, or surgical intervention.
Here, 'операция' refers to a surgical procedure.
Врач провел успешную операцию.
The doctor performed a successful surgery.
In this context, 'операция' refers to an organizational activity or task.
Компания завершила сложную операцию по слиянию.
The company completed a complex merger operation.
In this example, 'операция' denotes a planned military action or mission.