Adjective
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not rude
marked by satisfactory (or especially minimal) adherence to social usages and sufficient but not noteworthy consideration for others
"even if he didn't like them he should have been civil"- W.S. Maugham
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marked by refinement in taste and manners
"cultivated speech"
"cultured Bostonians"
"cultured tastes"
"a genteel old lady"
"polite society"
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showing regard for others in manners, speech, behavior, etc.