ir·ri·ta·ble

[ir-i-tuh-buhl]
adjective
1.
easily irritated or annoyed; readily excited to impatience or anger.
2.
Physiology, Biology. displaying irritability.
3.
Pathology. susceptible to physical irritation.
4.
Medicine/Medical. abnormally sensitive to a stimulus.

Origin:
1655–65; < Latin irrītābilis, equivalent to irrītā(re) to irritate + -bilis -ble

ir·ri·ta·ble·ness, noun
ir·ri·ta·bly, adverb
non·ir·ri·ta·ble, adjective
non·ir·ri·ta·ble·ness, noun
non·ir·ri·ta·b·ly, adverb
un·ir·ri·ta·ble, adjective
un·ir·ri·ta·b·ly, adverb


1. snappish, petulant, resentful. Irritable, testy, touchy, irascible are adjectives meaning easily upset, offended, or angered. Irritable means easily annoyed or bothered, and it implies cross and snappish behavior: an irritable clerk, rude and hostile; Impatient and irritable, he was constantly complaining. Testy describes the same kind of behavior or response, particularly to minor annoyances: always on edge, testy and sharp in response; testy and petulant, resenting any interruption. Touchy emphasizes oversensitivity and readiness to take offense, even when none is intended: especially touchy about any reference to obesity. Irascible means habitually angry or easily aroused to anger: an irascible tyrant, roaring at employees for the slightest error.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Irritable is always a great word to know.
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the offspring of a zebra and a donkey.
a fool or simpleton; ninny.
Collins
World English Dictionary
irritable (ˈɪrɪtəbəl) [Click for IPA pronunciation guide]
 
adj
1.  quickly irritated; easily annoyed; peevish
2.  (of all living organisms) capable of responding to such stimuli as heat, light, and touch
3.  pathol abnormally sensitive
 
irrita'bility
 
n
 
'irritableness
 
n
 
'irritably
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

irritable ir·ri·ta·ble (ĭr'ĭ-tə-bəl)
adj.

  1. Capable of reacting to a stimulus.

  2. Abnormally sensitive to a stimulus.

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
The thought of organized group activities makes me tired and irritable.
After some of the convulsive struggles of our irritable nature, he submitted
  himself, and repented in dust and ashes.
It does affect his behaviour as he cannot sleep and thus becomes irritable and
  unhappy.
The disorder is more common in people with irritable bowel syndrome and chronic
  pain.
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