Phrasal Verb: to brush up = to improve your skill at (something) or increase your knowledge of (something): My Spanish is very rusty. I need to brush up before I go on my vacation to Mexico. #PhrasalCards ━━━━━━━━━━━━━━━ ☞» @CambridgeWords ☞» @PhrasalVerbsIdioms ☞» @American_English_Club 362 views21:14