smarten up

smarten

[smahr-tn]
verb (used with object)
1.
to make more trim or spruce; improve in appearance (usually followed by up ): Try to smarten up your outfit.
2.
to make brisker, as a pace.
3.
to sharpen the judgment or broaden the experience of; educate (usually followed by up ): Someone has to smarten him up about dealing with people.
Verb phrases
4.
smarten up,
a.
to groom oneself: to smarten up before dinner.
b.
to become aware of one's mistakes, shortcomings, etc., and make efforts to correct them: If you don't smarten up, you're going to be out of a job.

Origin:
1805–15; smart + -en1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
smarten (ˈsmɑːtən)
 
vb
1.  (intr) to make oneself neater
2.  (tr) to make quicker or livelier

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

smarten
"to make smart, to spruce up, to improve appearance," 1815 (in "Emma"), from smart (adj.).
Online Etymology Dictionary, © 2010 Douglas Harper
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