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to polish; to shine; to burnish; to scour; to scrub; to brush (teeth); to grind (e.g. a lens)
to refine (a skill, etc.); to improve; to hone; to polish (up); to cultivate (one's character)
石を琢いて光らせた。
I polished the stone to make it shine.
腕を琢くために毎日練習する。
I practice every day to hone my skills.
この宝石は職人が丁寧に琢いたものだ。
This gemstone was carefully polished by a craftsman.