Ignorance is the parent of fear, and being completely nonplussed and confounded about the stranger, I confess I was now as much afraid of him as if it was the devil himself who had thus broken into my room at the dead of night.
There are no more uses of "nonplussed" in the book.
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She was nonplussed by the bluntness of the question.
JOHNSON (Nonplussed) You know, me and you ain’t never agreed about some things, Lena Younger.