convoluted

The plot of the mystery novel was so convoluted that I had to reread the last three chapters twice.

(Chinese) 这部推理小说的情节如此错综复杂，以至于我不得不把最后三章读了两遍。

The legal document was written in convoluted language that only a trained lawyer could understand.

(Chinese) 这份法律文件的用词极其晦涩，只有受过培训的律师才能看懂。