うでをみがく
Meanings
Expression
Verb (5-dan, く)
1. to polish one's skills
Composed of
arm; ability; skill; (physical) strength
to polish; to shine; to burnish; to refine (a skill, etc.); to improve; to hone
Examples (2 in total)
Tom needs to improve his skills.
He brushed up his English during his stay in London.