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irritant

noun [C] (MAKING ANGRY)
 
 
/ˈɪr.ɪ.tənt/ US  /-t̬ənt/

Definition

something that causes trouble or makes you annoyed: The report is bound to add a new irritant to international relations.Difficult things and peoplePreventing and impeding
(Definition of irritant noun (MAKING ANGRY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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