Meaning of “irritable” - Learner’s Dictionary

irritable

adjective uk us /ˈɪrɪtəbl/

becoming annoyed very easily:

Jack's been irritable all day.
irritability uk us /ˌɪrɪtəˈbɪləti/ noun [ U ]
irritably adverb

(Definition of “irritable” from the Cambridge Learner’s Dictionary © Cambridge University Press)