This is the 6420th most frequent Russian word.
штурм
"Штурм" - assault or storming (a direct attack, often on a fortified position or objective).
In this sentence, 'штурм' refers to a military assault or attack on a fortified place.
Штурм крепости занял три дня.
The storming of the fortress took three days.
Here, 'штурм' is used to describe a strategic or decisive sudden attack.
Идея внезапного штурма оказалась успешной.
The idea of a sudden attack proved to be successful.
In this context, 'штурм' is metaphorically used to describe an intense, concentrated effort or brainstorming.