Sentence:  The people in this show don't talk like normal people—they lecture, they argue, they negotiate, they strategize, they philosophize, they <WSD>platitudinize</WSD>, they deliver speeches about destiny, liberty, and bravery. 
Meaning of the word marked with <WSD> tags:  To utter one or more platitudes; to make obvious, trivial, or clichéd remarks concerning a topic.