The difference between Come to one's senses and Smarten up
When used as verbs, come to one's senses means to reawaken after having lost consciousness, whereas smarten up means to wear smart clothes and look more stylish.
check bellow for the other definitions of Come to one's senses and Smarten up
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Come to one's senses as a verb (idiomatic):
To reawaken after having lost consciousness.
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Come to one's senses as a verb (idiomatic):
To become reasonable, comprehending, or responsible, especially after having behaved in an unreasonable, uncomprehending, or irresponsible manner.
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Smarten up as a verb:
To wear smart clothes and look more stylish
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Smarten up as a verb:
To become less stupid or naive
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Smarten up as a verb:
To make less stupid or naive