Talk
You say things around a fire. In fact there are two fires, and you're talking with a group of people, all sitting around two nice campfires.
Imagine yourself next to the two campfires, having a heart-to-heart talk. What are you saying?
だん
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You talk in this intense, fiery way all the way until dawn (だん), but no longer! Once dawn comes the discussion needs to be concluded.
If you try to talk all night and past dawn, you'll burn out. Take the day, think, then tonight you can try to have an all-night talk again.