Such insolence of behaviour as Miss Tilney’s she had never heard of in her life!
Isabella’s opinion of the Tilneys did not influence her friend; she was sure there had been no insolence in the manners either of brother or sister; and she did not credit there being any pride in their hearts.
Without any reason that could justify, any apology that could atone for the abruptness, the rudeness, nay, the insolence of it.
There are no more uses of "insolent" in the book.
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I don’t recommend the hotel. The employees are insolent and unhelpful.