Some critics have accused Marcel Proust of employing a grandiloquent style, but closer examination of his writing style reveals an ingenious combination of the succinct colloquial phrase with more...
He became more than usually grandiloquent as if to make up for the years of silence with words of gold.
He was able to use a variety of grandiloquent words.
Lets go find the definition to impression?
He spoke so grandiloquently that he made everyone else at the party feel uneducated.