’In the main,’ said Nicholas, ’there may be no great difference of opinion between you and me, so far; but you will understand, that I desire to confront him, to justify myself, and to cast his duplicity and malice in his throat.’
There are no more uses of "duplicity" in the book.
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I trust her. Duplicity isn’t in her nature or her tool kit.
I was stunned by her duplicity. I really thought she loved me.