This is the 10602nd most frequent Russian word.
внушительного
Impressive; substantial; significant.
The word 'внушительного' is used as an attributive adjective, denoting the impressive scale of the house.
У него внушительного размера дом.
He has an impressively large house.
Here, 'внушительного' highlights the remarkable quality of the intended result.
Она стремилась достичь внушительного результата.
She aimed to achieve an impressive result.
In this sentence, 'внушительного' conveys the significant magnitude of the project.