irritant
/ˈɪrɪtənt/
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gmat
If you describe something as an irritant, you mean that it keeps annoying you. 让人恼火的事
adjective [原级] 刺激的；刺激性的
It may be that the itching is caused by contact with irritant material. 那儿的痒也许是由于接触刺激物而引起的。
noun [专属名词] [医] 刺激物，[医] 刺激剂
He said the issue was not a major irritant. 他说这一问题不是让他恼火的主要原因。
