Her delusional symptoms worsened, believing that people on TV were speaking directly to her.

delusional 是形容词，来自名词 delusion（妄想、错觉）。delusion 由前缀 de-（表示"偏离"）和词根 lus（源自拉丁语 ludere，意为"玩耍、欺骗"）组成，字面意思是"被欺骗而偏离现实"。 delusional 指"妄想的、错觉的"，描述一种错误但坚信不疑的信念或感知状态。