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to brush up
[phrase form: brush]
01
to practice and improve skills or knowledge that one has learned in the past
Transitive: to brush up a skill or knowledge
Examples
The chef is brushing up on culinary techniques to stay updated.
It 's a good idea to brush up on your driving skills before the road trip.
02
to make something better as if by polishing and removing dust
Transitive: to brush up a surface
Examples
The jeweler carefully brushed up the silver necklace, removing any tarnish.
She brushed up the picture frames to make them sparkle.
