muse
US /mjuːz/
UK /mjuːz/

1.
a person or personified force who is the source of inspiration for a creative artist
:
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She was his muse for many of his greatest paintings.
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The city itself became his muse, inspiring countless poems.
1.
to be absorbed in thought; to ponder or ruminate
:
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He would often muse about the meaning of life.
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She sat by the window, musing on her past.