（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。