The term 'been there, done that feeling' can be described by three words: ENNUI (5 letters), BLAH (4 letters), and deja vu (6 letters). ENNUI is a French word meaning a feeling of listlessness and dissatisfaction resulting from a lack of interest; it is often used to describe boredom. BLAH is an informal word used to describe a feeling of being uninterested, unmotivated, or tired. Finally, deja vu is the feeling of having already experienced something, even though it is actually happening for the first time. Together, these three words capture the feeling of having done something before and not finding any joy or satisfaction in it.