Brush up on: meaning and example

English
Brush up on
Improve your knowledge about a subject.
“I need to brush up on my French before the trip.”
From the free BrainPod Phrasal Verbs III.
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More words from Phrasal Verbs III

Fall behind
Fail to keep pace with work or studies.

Point out
Draw attention to a specific fact or detail.

Look into
Investigate or research.

Draw on
Use information or experience as a resource.

Catch up
Reach the same level or standard as others after being behind.

Spell out
Explain something in a very clear way with details.

Figure out
Understand or solve something.

Cut out
Remove part of something, often used in editing texts or preparing presentations.