dismissive

Adjective
  1. Showing indifference or disregard (synset 301346259)
    "a dismissive shrug"; "the firm is dismissive of the competitor's product"; "`chronic fatigue syndrome' was known by the dismissive term `housewife syndrome'"
  2. Stopping to associate with (synset 300077188)
    "they took dismissive action after the third violation"

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