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irresponsible
irresponsive
irretrievable
irreverent
irreversible
irrevocable
irrevocable trust
irrigate
irritable
irritable bowel syndrome
irritant
irritate
irritation
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irruption
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irritable
ir·ri·ta·ble [ írritəb'l ]


adjective 
Definition:
 
1. easily annoyed: easily annoyed or exasperated
2. medicine sensitive: extremely sensitive, especially to inflammation
3. biology responsive to stimuli: describes an organism that is able to respond to stimuli
[Mid-17th century. < Latin irritabilis "easily enraged" < irritare "provoke"]

ir·ri·ta·bil·i·ty [ ìrritə bíllətee ] noun
ir·ri·ta·ble·ness [ írritəb'lnəss ] noun
ir·ri·ta·bly adverb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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