overmuse
/ˈoʊvərˌmjuːz/Definitions
1. verb
to contemplate or ponder something at length, often excessively
“The philosopher spent all day overmusing about the meaning of life, much to the frustration of his colleagues.”
2. noun
a state of being deeply contemplative or preoccupied
“The artist’s overmuse led to a series of unfinished paintings, as she struggled to focus on the task at hand.”