verb
to smear or spread (a substance) over something in a messy or careless way
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The artist carefully besmeared the canvas with various colors to create a beautiful masterpiece.
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I accidentally besmeared my shirt with ketchup while eating a burger.
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She loves to besmear her face with makeup before going out with her friends.
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The scandalous rumors began to besmear his reputation, tarnishing it in the eyes of the public.