n. double-dealing; deliberate deceptiveness in behavior or speech; acting in bad faith.
When Tanya learned that Mark had been two-timing her, she was furious at his duplicity.
Sentence in Classic:
From all which circumstances his duplicity might have been suspected, since, had he meant to do as he had engaged, it was most unlikely that he should be negotiating so openly.
Discourses on the First Decade of Titus Livius By Niccolo Machiavelli Context
Hence it came about that I concealed my pleasures; and that when I reached years of reflection, and began to look round me and take stock of my progress and position in the world, I stood already committed to a profound duplicity of life.
Dr. Jekyll and Mr. Hyde By Robert Louis Stevenson Context
Now he saw that she understood entirely too well and he felt the usual masculine indignation at the duplicity of women.
Gone With The Wind By Margaret Mitche Context
The manoeuvres of selfishness and duplicity must ever be revolting, but I have heard nothing which really surprises me.
If I were not afraid of judging harshly, I should be almost tempted to say that there is a strong appearance of duplicity in all this.
Pride and Prejudice By Jane Austen Context
In order to free his mind from this indistinctness and duplicity of impression, which vexed it with a strange disquietude, he recalled and more thoroughly defined the plans which Hester and himself had sketched for their departure.
The Scarlet Letter By Nathaniel Hawthorne Context