muse
[ myooz ]
to think or meditate in silence, as on some subject
USE 1
During the long train ride, he found himself musing over the novel he had just read, pondering its deeper meanings.
USE 2
As the sun set, she sat by the window to muse on her future plans, completely absorbed in her thoughts.
USE 3
In the quiet of the morning, the poet would muse on the beauty of nature, finding inspiration for her verses.