IPA: /ˈbrʌʃʌp/
KK: /ˈbrʌʃˌʌp/
A practice or review that helps improve skills or refresh knowledge.
Before the exam, I did a quick brushup on my math skills.
Brushup → The word is formed from "brush" (from Old English "bruscan", meaning to clean or sweep) and "up" (meaning to a higher position or level). The term "brushup" refers to the act of refreshing or improving one's knowledge or skills, akin to cleaning up one's understanding.
Think of 'cleaning' or 'sweeping' ('brush') to improve or refresh your skills ('up').
No commonly confused words.