adjective
a word that describes or gives more information about a noun, in this case, 'impeccable' describes something that is perfect or flawless
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The candidate's impeccable record of service to the community impressed the selection committee.
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Her taste in fashion is impeccable; she always looks so put together.
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That new sushi place downtown has impeccable rolls, you have to try them!
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His ability to navigate complex situations with impeccable precision is truly impressive.