Definition: a mental problem which makes someone anxious or frightened about something Level: C2
他一直对自己的身高有很深的自卑感。
He's always had a huge ___complex about his height.
这本书探讨了该角色对失败的根深蒂固的情结。
The book explores the character's deep-seated ___complex regarding failure.
她当时饱受一种情结的折磨，让她觉得每个人都在议论她。
She was suffering from a ___complex that made her think everyone was talking about her.
