Plural of discourtesy; multiple instances of rude or impolite behavior or remarks.
From dis- (opposite) + courtesy, with the plural ending -ies. Courtesy itself comes from Latin 'cortensis,' relating to court life, and the negative prefix dis- creates the opposite meaning.
We usually say 'rudeness' as a mass noun, but 'discourtesies' lets you count individual rude acts—it's the difference between 'I don't like your mean attitude' versus 'I could list ten specific mean things you did.'
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