This is the 1708th most frequent Russian word.
вертолета
"Helicopter" (genitive singular form).
Here, 'вертолета' (helicopter) is used in the context of describing an action taken by the helicopter, emphasizing its physical entity.
Я видел, как вертолета приземлился рядом с домом.
I saw the helicopter landing next to the house.
In this sentence, 'вертолета' (helicopter) highlights the sound associated with the helicopter, illustrating its impact on the environment.
Звук вертолета был слышен за много километров.
The sound of the helicopter was heard from many kilometers away.
In this context, 'вертолета' (helicopter) signifies possession, indicating that the rotor belongs to the helicopter.