brush up on
phrase · Collocation / phrase B2
Plain meaning
to improve knowledge or skill you once had
Exam-register meaning
In exam writing, it can express to improve knowledge or skill you once had in a clearer or more formal way.
In context
naturalThe discussion gave us a useful example of brush up on.
examPolicy makers must consider brush up on when evaluating long-term social and economic outcomes.
Common collocations
brush up ona clear example of brush up onuse brush up on appropriately
Watch out
Do not change the key word order in “brush up on”; collocations sound natural because the words travel together.