rubbed up; rubbing up; rubs up
Definition of rub up
1
: to revive or refresh knowledge of : recall
2
: to improve the keenness of (a mental faculty)
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“Rub up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rub%20up. Accessed 7 Mar. 2021.
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Time Traveler for rub up
The first known use of rub up was circa 1571
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