They know that their knavery is no secret but they don't mind.
To “resist not evil” seemed to him then only a rather feeble sort of knavery.
From this retreat we could see the proof of knavery in the villages below.
He was very cunning to be sure; but the "afflicted" girls could see through his knavery.
Folly and knavery were, for a time, completely in the ascendant.