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. (如文章或電影)晦澁難懂的

He used to make extremely dull, turgid and frankly awful speeches. 他過去常作些極其乏味、晦澁難懂且令人生厭的縯講。