convoluted
adjective uk/ˈkɒn.və.luː.tɪd/ us/ˈkɑːn.və.luː.t̬ɪd/
盘绕的;弯曲的，曲折的
very twisted
a very convoluted route/knot 曲折盘旋的路线／缠绕的绳结
（句子、解释、论据等）冗长费解的，繁复晦涩的
Convoluted sentences, explanations, arguments, etc. are unreasonably long and difficult to understand.
His grammar explanations are terribly convoluted. 他对语法的讲解非常晦涩难懂。
Her book is full of long, convoluted sentences. 她的书里全是些冗长晦涩的句子。