Structure
What are the elements that make up this word's structure?
In the word reverie, do we have the same suffix brownies and cookies? If so, that leaves us with:
rever + ie
If I add an revere with a meaning of "respect and admire." However, before I go too far, I will check Etymonline to see if these are indeed the elements in this word.
Our Etymonline entry for reverie tells us the word came to English in the 1400s meaning "frolic." Hmmm...I'm beginning to think there is a relationship with revelry after all. So how did the meaning of reverie drift to where it meant something akin to daydreaming?
It appears the root of the word is the French resver, a word with a sense of "wandering; dreaming." From there, the trail goes cold. However, the next paragraph in the entry moves us up in time to the 1600s. An entry in Etymonline will often do that. The first paragraph will take us back in time to the origins of the word. The following paragraphs will take us from the entry into English up to the present day, often documenting the phrases and idioms the word shows up in as well.
The word was reborrowed, now taking on more of the "daydream" sense. In the 1800s the word was again used to refer to certain musical compositions. Meanings drift from their denotation in the language of origin to now, but some sense of the original always hangs around, like, well...a reverie.