Examples of usage:

  1. So entirely unconcerned did they appear, that some of them, who were on deck when the town was in flames, seemed to admire the sight, and frequently cried out, that it was maitai, or very fine. "A General History and Collection of Voyages and Travels, Volume 16" by Robert Kerr
  2. As his pony trotted along with the others, it looked as if the cook was in constant danger of a fall from his lofty seat, but he sat as calm and unconcerned as one could imagine. "Our Little Korean Cousin" by H. Lee M. Pike
  3. He wasn't actually as unconcerned as he appeared, but he had early learned that effort in their direction was unnecessary. "Gigolo" by Edna Ferber

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