This is the 2333rd most frequent Russian word.
мощный
Powerful.
The word 'мощный' is used to describe the engine of the car as having high power or performance.
Этот автомобиль обладает мощным двигателем.
This car has a powerful engine.
Here, 'мощный' is used to characterize the storm as being very strong and impactful.
Вчера был мощный шторм, который разрушил деревья.
Yesterday there was a powerful storm that destroyed trees.
In this instance, 'мощный' refers to the speech being emotionally or persuasively impactful and effective.