/ ˈɪrɪtəbl; NAmE / adjective
getting annoyed easily; showing your anger
SYN bad-tempered :
to be tired and irritable
an irritable gesture
► ir·rit·abil·ity / ˌɪrɪtəˈbɪləti; NAmE / noun [ U ]
► ir·rit·ably / -əbli; NAmE / adverb
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WORD ORIGIN
mid 17th cent.: from Latin irritabilis , from the verb irritare .