Stephano cannot communicate clearly with Caliban because of his accent, whuch makes him angry. ... Stephano sees Caliban's language abilities as threat and makes plans to subdue him.
You could say: sometimes the person lecturing repeats the same thing too many time without realizing it, it's tiresome for both you and the person lecturing, and lectures can be long.
ik this is a short answer, but I hope any of this helps.
