polished

Something that's polished has been perfected — either by being rubbed until it's shiny or practiced until it appears skilled and elegant.

A polished diamond is bright, with a smooth, shining surface that reflects light. For an object to be polished, someone has to polish it, rubbing and buffing until it shines. You can also have a figuratively polished version of your essay that's been spruced up through careful editing. If a person is polished, they're graceful or accomplished: "Her polished style of speaking was almost intimidating!"

Definitions of polished
  1. adjective
    perfected or made shiny and smooth
    “his polished prose”
    “in a freshly ironed dress and polished shoes”
    “freshly polished silver”
    Synonyms:
    bright
    emitting or reflecting light readily or in large amounts
    bright, burnished, lustrous, shining, shiny
    made smooth and bright by or as if by rubbing; reflecting a sheen or glow
    finished
    (of skills or the products of skills) brought to or having the greatest excellence; perfected
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    Antonyms:
    unpolished
    not carefully reworked or perfected or made smooth by polishing
    dull
    emitting or reflecting very little light
    raw
    untempered and unrefined
    rough
    not perfected
    unburnished
    of metals e.g.; not made shiny and smooth by friction
    unrefined
    (used of persons and their behavior) not refined; uncouth
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  2. adjective
    (of lumber or stone) to trim and smooth
    synonyms: dressed
    finished
    (of materials or goods) brought to the desired final state
  3. adjective
    showing a high degree of refinement and the assurance that comes from wide social experience
    “his polished manner”
    synonyms: refined, svelte, urbane
    sophisticated
    having or appealing to those having worldly knowledge and refinement and savoir-faire
  4. adjective
    (of grains especially rice) having the husk or outer layers removed
    polished rice”
    synonyms: milled
    processed
    prepared or converted from a natural state by subjecting to a special process
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