irritant

ir|ri|tant /'ɪrɪtənt/ (irritants)
1 [N-COUNT]
If you describe something as an irritant, you mean that it keeps annoying you. (FORMAL)
He said the issue was not a major irritant.
= annoyance
2 [N-COUNT]
An irritant is a substance which causes a part of your body to itch or become sore. (FORMAL)
Many pesticides are irritants.

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