brush up on

Short definition: The phrase brush up on means to review or practice a skill or topic you already know in order to improve it, refresh your memory, or regain confidence, especially before an exam, task, or important situation.

Looking for a clear and natural explanation of the phrase brush up on? This phrase is very common in everyday English, especially when talking about learning and preparation. To brush up on means reviewing or practicing something you already know so you can do it better. You will hear it in conversations about exams, work skills, and personal improvement. Below, each meaning is explained in a calm and natural way, with long definitions and realistic examples.

brush up on verb phrase /brʌʃ ʌp ɒn/

Forms: brush up on, brushes up on, brushed up on, brushing up on
Related: review v., practice v., refresh v.
Syllable: brush up on

  1. (Verb Phrase) To review or practice a skill or subject you already know in order to improve it.

    To brush up on something means going back over knowledge or skills you learned before so they feel fresh again. This often happens when you have not used a skill for a long time or want to perform better. It does not mean learning from zero, but improving what is already there. The phrase is commonly used with languages, skills, and general knowledge.

    She decided to brush up on her French before traveling to Paris.
    He needs to brush up on his presentation skills before the conference.
    I spent the weekend brushing up on basic math for the exam.

    Synonyms: review, refresh your knowledge, practice again, revise, sharpen skills, improve basics, go over again, refresh memory, strengthen understanding, rehearse, polish skills, update knowledge
    Antonyms: forget, neglect practice, ignore learning, let skills fade, stop reviewing, abandon study, lose touch with, avoid practice, overlook basics, fall behind, skip revision, give up learning

  2. (Verb Phrase) To prepare yourself by revisiting information before an important event or task.

    Brush up on can also emphasize preparation rather than long-term improvement. People use it before interviews, tests, meetings, or new responsibilities. The focus is on confidence and readiness. It suggests short-term review with a clear goal in mind.

    He brushed up on company policies before starting his new role.
    She brushed up on safety rules before the training session.
    They brushed up on old notes before the final discussion.

    Synonyms: prepare by reviewing, study again briefly, revise quickly, get ready, refresh details, go over notes, review essentials, prepare yourself, recheck knowledge, rehearse information, refresh understanding, get up to speed
    Antonyms: go in unprepared, skip preparation, ignore review, avoid studying, show up cold, neglect readiness, fail to prepare, overlook details, wing it, be unready, rely on memory alone, take no action

An Explanation of the Word "brush up on" in an Image

Landscape cartoon illustration of a student studying with books and notes, representing the idiom brush up on and the act of refreshing or improving skills.
A cheerful cartoon illustration of a student reviewing books and notes with a bright idea moment, clearly showing the idiom “brush up on” as reviewing or improving knowledge and skills before using them again.

Conversation Using the Phrasal Verb Brush up on

Before a trip to Paris, friends Liam and Chloe are preparing to navigate a new language and culture. The dialogue explores the phrasal verb brush up on, which means to improve your knowledge of something or your skill at doing something that you have partly forgotten.

Liam: I really need to brush up on my French before we leave; I haven't practiced since I was in high school.

Chloe: I agree; I’m going to brush up on the local customs and etiquette so we don't accidentally offend anyone during dinner.

Liam: I read that it’s helpful to brush up on your basic math skills before taking the standardized entrance exam next month.

Chloe: I noticed that you’ve started to brush up on your guitar playing; you sound much better than you did last summer.

Liam: If I brush up on the technical manual tonight, I should be able to fix the software bug first thing tomorrow morning.

Chloe: I saw him brush up on the rules of the game just before the tournament started so he wouldn't make any simple mistakes.

Liam: It’s a lot of information to remember, but a quick review will help you brush up on the most important concepts quickly.

Chloe: I agree; once you brush up on the basics, the more advanced parts of the subject will likely come back to you naturally.

Liam: I’m glad we’re doing this; it’s much better to brush up on everything now than to struggle once we arrive in France.

Chloe: Me too; after I brush up on my vocabulary, I’ll feel much more confident ordering at the bakeries and cafés.

Phrases Containing the Expression Brush Up On

The phrases below show how the expression brush up on is used to describe reviewing or improving knowledge or skills that you already have but may be rusty.

Brush up on

To review and improve knowledge.

I need to brush up on my grammar before the exam.

Brush up on skills

To improve abilities.

She brushed up on her presentation skills before the conference.

Brush up on English

To improve language ability.

He decided to brush up on his English before moving abroad.

Brush up on knowledge

To refresh understanding.

She brushed up on her knowledge of history for the interview.

Brush up on basics

To review fundamentals.

It’s always good to brush up on the basics.

Brush up on math

To review mathematics.

He brushed up on math before returning to school.

Brush up on vocabulary

To review words.

She brushed up on vocabulary to sound more confident.

Brush up on grammar

To review language rules.

I brushed up on grammar before writing the report.

Brush up on technology

To update technical skills.

He brushed up on technology to keep up with new tools.

Brush up on job skills

To prepare professionally.

She brushed up on job skills before applying for a promotion.

Brush up on safety rules

To review safety procedures.

All staff must brush up on safety rules annually.

Brush up on communication skills

To improve communication.

He brushed up on communication skills to work better with clients.

Brush up on interview skills

To prepare for interviews.

She brushed up on interview skills before meeting recruiters.

Brush up on writing

To improve writing ability.

He brushed up on writing before starting the blog.

Brush up on speaking skills

To improve speaking ability.

She brushed up on speaking skills to feel more confident.

Brush up on professional knowledge

To refresh career-related knowledge.

He brushed up on professional knowledge to stay competitive.

Brush up on old lessons

To review past learning.

She brushed up on old lessons before teaching the class.

Brush up on rules

To review regulations.

It’s important to brush up on rules before taking the test.

Brush up on pronunciation

To improve speaking accuracy.

He brushed up on pronunciation to sound clearer.

Brush up on confidence

To regain self-assurance.

Public speaking helped her brush up on confidence.

Words Rhyme with brush up on

rush up on
crush up on
flush up on
hush up on
lush up on
mush up on
gush up on
blush up on
plush up on
slush up on
on
con
don
non
swan
upon
begone
amazon
phenomenon
marathon
octagon
pentagon
hexagon
argon
jargon
pardon
garden
harden
warden
burden
POS: Verb Phrase  Category: Tools