This is the 8028th most frequent Japanese word.
妄想
Delusion or wild imagination.
In this context, 妄想 refers to unrealistic ideas or delusions, implying the fabricated nature of his story.
彼の話は全くの妄想だった。
His story was pure delusion.
Here, 妄想 is used to indicate imagining something wonderful, emphasizing creativity and imagination.
彼女は未来について楽しい妄想を膨らませている。
She is expanding joyful fantasies about the future.
In this sentence, 妄想 represents speculations or obsessing over thoughts related to that event, showing persistent imagining.