腕(うで)を磨(みが)く

Idiom structure

腕(うで) (arm; skill) + を + 磨(みが)く (to polish)

腕(うで) here means skill/ability. 磨(みが)く (to polish) creates the metaphor of polishing or refining a skill like one would polish a gem or blade.

Common collocations

• 料理(りょうり)の腕(うで)を磨(みが)く - to improve cooking skills
• 語学(ごがく)の腕(うで)を磨(みが)く - to improve language skills
• 技術(ぎじゅつ)の腕(うで)を磨(みが)く - to hone technical skills
• 日々(ひび)腕(うで)を磨(みが)く - to polish skills day by day

Usage

Implies

• Deliberate effort to improve
• Ongoing process, not one-time action
• Recognition that one can always get better
• Dedication and commitment to improvement

Similar words

• 技(わざ)を磨(みが)く - to polish one's technique
• 実力(じつりょく)を付(つ)ける - to build up ability
• スキルアップする - to skill up (modern)
• 研鑽(けんさん)を積(つ)む - to accumulate training (formal)

Related words

腕(うで)を振(ふ)るう - to show one's skill (complementary - first you polish, then you show)