He was mortified beyond expression by the idea that he had been duped.
It behooves me all the more to see to it that I am not duped in the end.
And are you, my dear friend, to be duped by this hackneyed word?
Fooled, duped, and laughed at after twenty years of hard service!
But more commonly there is calculation on both sides and both are duped.
But, duped by his successes, ...