aggravator
/ˈæɡrəˌveɪtər/
noun
- A person or thing that makes a situation, problem, or condition worse or more serious.
- In the argument, he was the main aggravator, always bringing up old disagreements.
- His constant complaining was an aggravator in an already tense meeting.
- The hot weather acted as an aggravator for her allergies.
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