磨く

1. Origins, structure, and basic meaning

• Structure: 磨く(みがく) means to rub something clean or polish it, and also to hone an ability.
• Basic usage: It describes polishing shoes or working to improve language skills through experience.

2. Common pitfalls and similar expressions

• Refining a surface or an ability
  • 靴を磨く means polishing shoes; 語学力を磨く means developing language skills through practice and experience.