IPA: /ˈdriːmfəli/
KK: /drimfəli/
In a way that shows a dreamy or imaginative quality, often lost in thought or fantasy.
She gazed dreamfully out the window, imagining far-off places.
Dreamfully → It is formed from "dream" (from Old English *drēam*, meaning a series of thoughts, images, or emotions occurring during sleep) and "-fully" (meaning full of). The word "dreamfully" means full of dreams or in a dreamy state.
Think of being 'full of dreams' — 'dream' refers to those thoughts and images during sleep, and '-fully' means full of something.