noun / verb
relish
REL-ish/rˈɛlɪʃ/
Great pleasure in something.
He relishes a spoonful of soup with visible delight.
Etymology
The “back” and “loosen” elements led to a verb meaning “leave behind,” then to a noun for what remained, including an aftertaste. A pleasing taste became enjoyment or eager appreciation more generally.
In context
They then began to eat with very great relish and very leisurely, making the most of each morsel