I. adjective Etymology: Middle English, from Latin callosus, from callum, callus ~ skin Date: 15th century 1. being hardened and thickened, having calluses , 2. feeling no emotion, feeling or showing no sympathy for others ; hard-hearted , ~ly adverb ~ness noun II. transitive verb Date: 1834 to make ~
CALLOUS
Meaning of CALLOUS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012