Callous Definition

kăləs

callouses

adjective

Having calluses; toughened.

Callous skin on the elbow.

American Heritage Medicine

Thick and hardened.

Webster's New World

Lacking, or showing a lack of, pity, mercy, etc.; unfeeling.

Webster's New World

Synonyms:

Antonyms:

verb

callouses

To make or become callous.

American Heritage

To make or become callous.

American Heritage Medicine

Synonyms:

noun

Webster's New World

Synonyms:

Origin of Callous

Middle English from Old French cailleux from Latin callōsus from callum hard skin

From American Heritage Dictionary of the English Language, 5th Edition
From Latin callōsus (“hard-skinned”), from callum (“hardened skin”) + -ōsus.

From Wiktionary