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callous

/kəˈlɔs/ · cal·ous
adjective
  1. Having or showing a lack of feeling or concern for others. The callous remarks made by the politician sparked outrage among the public.
  2. Having a hardened or thickened area of skin, often as a result of repeated pressure or friction. The callous on his heel made it difficult for him to walk without pain.
noun
  1. A hardened or thickened area of skin, often as a result of repeated pressure or friction. He had to remove the callous on his foot before it became infected.
Did you know? The word 'callous' has been used to describe not only physical calluses, but also emotional insensitivity, since the 15th century. This dual meaning reflects the complex relationship between physical and emotional pain.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Aug 15, 2026