delusion

她还抱有他会回心转意的妄想。

She still clings to the ___delusion that he will change his mind.

远处的海市蜃楼不过是光线造成的幻象。

The distant mirage was just a ___delusion caused by light refraction.

尽管医生多次解释，她仍然坚持认为自己被跟踪的妄想。

Despite doctors' explanations, she still held the ___delusion that she was being followed.