An insensitive or emotionally unfeeling individual.

एक असंवेदनशील या भावनात्मक रूप से बेपरवाह व्यक्ति।

English Usage: His callous pad personality made it difficult for him to empathize with others.

Hindi Usage: उसकी असंवेदनशीलता के कारण उसे दूसरों के प्रति सहानुभूति रखना कठिन हो गया।

A thickened area of skin that has become hard due to friction or pressure.