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idiom

sharp as a tack

SHARP az uh TAK

ʃɑːrp æz ə tæk

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Syllable breakdown

sharpasatack

Dictionary meaning

extremely intelligent, mentally acute, and quick to understand; having a keen mind that grasps information rapidly and accurately; complimentary phrase used to describe someone whose intellect is as pointed and effective as the tip of a sharp tack

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