worsen
verb [ I or T ] uk/ˈwɜː.sən/ us/ˈwɝː.sən/
C1 （使）恶化；（使）更糟
to become worse or to make something become worse
As the company's financial problems worsened, several directors resigned. 由于公司的财务状况恶化，有几位经理辞职了。
The continued supply of arms to the region will only worsen the situation. 向该地区不断提供武器只会使局势恶化。