adjective
a descriptive word that modifies or describes a noun, in this case, 'smudgy' describes something that is marked or blurred by smudges
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The printer produced smudgy copies due to a malfunction in the toner cartridge.
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I accidentally touched the wet paint and left a smudgy mark on the wall.
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Her makeup was so smudgy after dancing all night at the club.
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The artist intentionally created a smudgy effect in the background of the painting to add depth.