irritant
noun [ C ] uk/ˈɪr.ɪ.tənt/ /ˈɪr.ə.tənt/
(MAKING ANGRY)
令人烦恼的事物；造成麻烦的事物
something that causes trouble or makes you annoyed
The report is bound to add a new irritant to international relations. 这份报告肯定会给国际关系添加新麻烦。
Synonyms: annoyancebore (ANNOYING) bother (ANNOYING) inconvenience nuisancea pain (in the neck) pest
(MAKING SORE)
刺激物
a substance that makes part of your body sore or painful
Pollen is an irritant, causing red and sore eyes in sensitive people. 花粉有刺激性，会使过敏的人眼睛红肿疼痛。