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Adverb: nonchalantly  ,nón-shu'laant-lee [N. Amer], nón-shu-lunt-lee [Brit]
  1. In a composed and unconcerned manner
    "without more ado Barker borrowed a knife from his brigade Major and honed it on a carborundum stone as nonchalantly as a butcher";
    - coolly, nervelessly
  2. In an unconcerned manner
    "glanced nonchalantly at the headlines";
    - casually