Part of speech: adverb


Part of speech: noun


Part of speech: adjective

Heedless; giddy; stupid.

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Usage examples "thoughtless":

  1. You are not a thoughtless child. - "Out of the Primitive", Robert Ames Bennet.
  2. And he may recall how frightened he was when some foolishly thoughtless friend or heartless bully tried to duck him, or to push him beyond his depth. - "Healthful Sports for Boys", Alfred Rochefort.
  3. How thoughtless, how cruel of me! - "The Black Robe", Wilkie Collins.