opaque
adjective uk/əʊˈpeɪk/ us/oʊˈpeɪk/
不透明的；不透光的
preventing light from travelling through, and therefore not transparent or translucent
opaque glass/tights 不透明的玻璃／连裤袜
formal（文字或演讲）难理解的;晦涩的;含糊的
Opaque writing or speech is difficult to understand.
I find her poetry a little too opaque. 我发现她的诗相当晦涩。