noun, noun or participle which takes 'suru', transitive verb
Physical process of smoothing, shining, or shaping a surface by abrasion. Used for metals, lenses, gemstones, and similar materials.
レンズを研磨する作業はとても繊細だ。
The work of grinding lenses is very delicate.
この宝石は研
This gemstone was polished and its brilliance increased.
noun, noun or participle which takes 'suru', transitive verb
refining; polishing (skills); disciplining oneself
Metaphorical extension: improving a skill, knowledge, or character through dedicated effort. Often used with words like 技術, 腕, 人格, or 知識.
彼は毎日練習して技術を研磨している。
He practices every day to refine his skills.
留学中に語学力を研磨するつもりだ。
I intend to polish my language ability while studying abroad.