うでをみが
Meanings
Expression
Verb (5-dan, く)
1. to polish one's skills
Composed of
arm; skill; efforts; ability
to polish; to shine; to brush (e.g. teeth); to refine (e.g. a skill); to improve; to cultivate
Examples (2 in total)
Tom needs to improve his skills.
He brushed up his English during his stay in London.