rub up on
C1 neutral inseparable transitive
In simple words
to practice or study something again so you remember it better
Literal meaning: to rub something onto something else
Meanings
1 C1
idiomatic
neutral
to refresh or improve your knowledge of a subject or skill
"I need to rub up on my German before the trip to Berlin."
Grammar: inseparable
Usage notes
Less common than 'brush up on', which most learners will hear more often. Often used in British English.
Commonly used with
French Spanish history maths grammar interview skills
Forms
Base
rub up on
I/you/we/they
3rd person
rubs up on
he/she/it
Past simple
rubed up on
yesterday
Past participle
rubed up on
have + pp
-ing form
rubing up on
continuous
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Synonyms
brush up on revise review refresh your knowledge of study again read up on
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