paranoia

他的妄想症让他怀疑每个人都在密谋对付他。

His ___paranoia made him suspect that everyone was plotting against him.

他对陌生人的过度戒备源于毫无根据的偏执。

His unfounded ___paranoia about strangers made him overly cautious.

她的妄想症让她总是怀疑同事在密谋陷害她。

Her ___paranoia made her constantly suspect her coworkers were plotting against her.