callous

Meanings

1. 1
   adj

   Cruel and uncaring about other people's feelings or suffering.

   She was so callous that she mocked a sick man to his face.

2. 2
   adj

   (Of skin) hardened and thickened with calluses.

   Years of manual work had left his hands rough and callous.

From Latin callōsus (“hard-skinned”), from callum (“hardened skin”) + -ōsus.

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