turgid

1. ADJ If you describe something such as a piece of writing or a movie as turgid, you think it is too serious and difficult to understand. (如文章或电影)晦涩难懂的

He used to make extremely dull, turgid and frankly awful speeches. 他过去常作些极其乏味、晦涩难懂且令人生厌的演讲。