callous

[kal-uhs]
adjective
1.
made hard; hardened.
2.
insensitive; indifferent; unsympathetic: They have a callous attitude toward the sufferings of others.
3.
having a callus; indurated, as parts of the skin exposed to friction.
verb (used with object), verb (used without object)
4.
to make or become hard or callous.

Origin:
1375–1425; late Middle English < Latin callōsus hard-skinned, tough, equivalent to call(um) tough skin, any hard substance + -ōsus -ous

callously, adverb
callousness, noun
uncallous, adjective
uncallously, adverb
uncallousness, noun

callous, callus.


1. hard. 2. inured, insensible, obtuse. See hard.


1. soft. 2. sensitive.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
callous (ˈkæləs)
 
adj
1.  unfeeling; insensitive
2.  (of skin) hardened and thickened
 
vb
3.  pathol to make or become callous
 
[C16: from Latin callōsus; see callus]
 
'callously
 
adv
 
'callousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

callous
c.1400, "hardened," in the physical sense, from L. callosus "thick-skinned," from callus, callum "hard skin" (see callus). The figurative sense of "unfeeling" appeared in English by 1670s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

callous cal·lous (kāl'əs)
adj.
Of, relating to, or characteristic of a callus or callosity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
And when they or their family members have complained, their pleas for help
  have been callously ignored.
Insiders who were deemed a security risk were callously murdered.
He can be callously murderous either with a gun or with his fists.
It may sound callously brutal, but it might result in less flooding and misery
  in the future.
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