- 疑心病 yíxīnbìng suspiciona suspicious state of mind; excessive distrust or doubt of others
- 疑心生暗鬼 yíxīnshēng'ànguǐ suspicion creates imaginary fearsA paranoid or suspicious mind will imagine non-existent threats; suspicions create fantastic fears.
- 怀疑心 huáiyíxīn incredulitya state of skepticism; a suspicious or doubting mind