noun
lack of respect; rudeness
adjective
impertinent (related to or characterized by impertinence)
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His impertinence towards the royal family was met with swift reprimand.
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I can't believe the impertinence of that guy, asking such personal questions!
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The teacher was not amused by the student's impertinence in class.
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The impertinence of nature's beauty left me in awe.