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Webster 1828 Edition

Noun.

Hardness, induration, applied to the body; insensibility, applied to the mind or heart.

callousness ‎(usually uncountable, plural callousnesses)

The quality of being callous; emotional hardheartedness or indifference.
Fred was known for his callousness; local panhandlers had long since learned not to try their sob stories on him.
The quality of having calluses

quality of being callous; emotional hardheartedness or indifference

German: Gefühllosigkeit f, Unempfindlichkeit f, Abgebrühtheit f, Herzlosigkeit f

quality of having calluses