exacerbation
🇺🇸
/ɪɡˌzæsərˈbeɪʃn/
🇬🇧
/ɪɡˌzæsəˈbeɪʃn/
a situation where something bad becomes more intense or severe
The pollution caused an exacerbation of her asthma symptoms.
污染加剧了她的哮喘症状。