paranoia
noun uk/ˌpær.əˈnɔɪ.ə/ us/ˌper.əˈnɔɪ.ə/
[ C or U ]疑神疑鬼，多疑
an extreme and unreasonable feeling that other people do not like you or are going to harm or criticize you
There's a lot of paranoia about crime at the moment. 现在人们十分多疑，总是害怕会有犯罪发生。
[ U ] psychology specialized患妄想症的人;偏执狂
Someone who has paranoia has unreasonable false beliefs as a part of another mental illness, for example schizophrenia.