Sentence:  We already know each other's views on these subjects; we speak in order to keep the silence away. It's as though we <WSD>reheat</WSD> these issues in our very dear little copper saucepan—so battered and beloved—hoping by accident to stir in something new. 
Meaning of the word marked with <WSD> tags:  To heat something after it has cooled off, especially previously cooked food ("also in figurative senses").