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to brush up on

to brush up on

19 3.5
Review and improve what you know about something you have not used for a while
  • phrasal verb
  • /brʌʃ ʌp ɑn/
translation icon : repasar
  • She decided to brush up on her Spanish before the trip to Mexico.

They've also got their own podcast, so you can brush up on your French and Spanish on the go.

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Examples

  • Before the exam, I need to brush up on my math skills.

  • Brush up on your Italian.

  • I gotta brush up on the steps.

  • I expect to brush up on some of them in Europe this summer.

  • Why not take a moment to brush up on what the law requires?

    Blog text (19)
  • I would love to see it just to brush up on my tech.

    Blog text (27)
  • We have to brush up on your hospitality skills.

  • I'm going to get some books to brush up on my Korean.

  • Yes, and brush up on your interpersonal relations.

  • I went out and bought a sailing manual to brush up on the terminology.

    Academic text (2013)

Synonyms

to review
vsto brush up on
106 1.8

To study something again to remember it better

is aimed at broader improvement after not using something rather than exam preparation
to brush up
vsto brush up on
22 3.7

Refresh your knowledge or skill by practising and reviewing

focuses on reviewing and improving after a period without use
to relearn
vsto brush up on
13 4.1

To study or practice something you once knew but forgot

focuses on review and skill refresh rather than full new learning
to refamiliarize
vsto brush up on
  • US
1 6.5

To learn or help someone remember how to use something again after not using it for a while

is about improving knowledge rather than merely becoming familiar again

Antonyms

1.0

Not remember something you should remember

How Prepared

to cram
15 3.9
to study
1.0
to brush up on
19 3.5
to review
106 1.8

Surface Forms

brush up on infinitive
brushed up on past participle
brushing up on present participle
brushes up on third person singular

Morphology

brush + up + on

The sense 'to review or refresh knowledge' is a metaphorical extension of 'brush' (literally to clean) combined with 'up' (completion/augmentation), so the parts hint at a renewing action but do not yield a literal meaning. A B1 learner who knows the constituents might infer a sense of improving or refreshing, but the specific phrasal-verb usage and particle+preposition pattern are not fully predictable without prior exposure.

Etymology

The phrasal verb brush up on comes from the simple image of using a brush to clean something that has got dusty or old. If you brush something up you make it fresh again, so the phrase means 'to review or improve' knowledge or a skill you have not used for a while.