他通过隐瞒事实来欺骗别人，这种欺骗行为是不可接受的。

His ___deceit in hiding the truth was unacceptable.

他通过精心设计的骗局欺骗了所有人。

He fooled everyone with his carefully planned ___deceit.

他的微笑掩盖了内心的欺骗。

His smile concealed the ___deceit in his heart.