Hearken

According to some poetry by Edgar E. Poe, harken means 'listen' as if you were trying to make someone listen to you, like shuting them up.

How, then, am I mad? Hearken! and observe how healthily --how calmly I can tell you the whole story.
-Edgar E. Poe, The Tell Tale Heart

Hearken!... That's not the point of this conversation.