crassly

/ˈkræsli/
adverb
  1. In a way that shows a complete lack of sensitivity, tact, or intelligence; rudely or stupidly.
    • He crassly interrupted the speaker to promote his own book.
    • She crassly joked about the accident, not realizing how upset everyone was.
    • The company crassly ignored the community's concerns about pollution.
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