Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb idiomatic  To 
review ; toimprove an existing butrusty or under-developedskill . 
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- verb refresh one's memory
 - verb bring to a highly developed, finished, or refined state
 
Etymologies
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Examples
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