It was an air of inanities uttered as revelations and insolently demanding acceptance as such; an air, not of innocent presumption, but of conscious effrontery; as if the author knew the nature of his work and boasted of his power to make it appear sublime in the minds of his audience and thus destroy the capacity for the sublime within them.
There are no more uses of "effrontery" in the book.
Show samples from other sources
She had the effrontery to laugh at the mayor’s request.
Armed with too much confidence and effrontery, she made a lot of enemies.