insensible

[in-sen-suh-buhl]
adjective
1.
incapable of feeling or perceiving; deprived of sensation; unconscious, as a person after a violent blow.
2.
without or not subject to a particular feeling or sensation: insensible to shame; insensible to the cold.
3.
unaware; unconscious; inappreciative: We are not insensible of your kindness.
4.
not perceptible by the senses; imperceptible: insensible transitions.
5.
unresponsive in feeling.
6.
not susceptible of emotion or passion; void of any feeling.
7.
not endowed with feeling or sensation, as matter; inanimate.

Origin:
1350–1400; Middle English < Latin insēnsibilis. See in-3, sensible

insensibly, adverb
insensibility, noun


5, 6. apathetic, unfeeling, indifferent, cool; dull, passionless, emotionless, torpid.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
insensible (ɪnˈsɛnsəbəl)
 
adj (foll by of or to)
1.  lacking sensation or consciousness
2.  unaware (of) or indifferent (to): insensible to suffering
3.  thoughtless or callous
4.  a less common word for imperceptible
 
insensi'bility
 
n
 
in'sensibleness
 
n
 
in'sensibly
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

insensible
late 14c., "lacking the power to feel with the senses," from L. insensibilis "that cannot be felt," from in- "not" + sensibilis, from sentire "to feel." Meaning "unconscious" is attested from early 15c. See insensate.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

insensible in·sen·si·ble (ĭn-sěn'sə-bəl)
adj.

  1. Having lost consciousness, especially temporarily; unconscious.

  2. Lacking physical sensation or the power to react, as to pain or cold; numb.

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
Some researchers speculate that some dolphins and whales use intense blasts of sound to blast fish or squid into insensibility.
The constancy of this saint at the loss of friends proceeded not from insensibility.
Soon after this he recovered from his insensibility, began to move his arms and legs, and spoke with some difficulty.
Delivery of calm animals to the place of application is essential to ensure rapid and effective insensibility.
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