"变得越来越严重"可以用英语表示为"worsen"或 "deteriorate".
"worsen" 来源于 Old Engpsh "wyrsan"，意思是使变坏。
"deteriorate" 来源于 Late Latin "deterioratus"，意思是使变差。
例句：
The situation has worsened over the past few weeks. (情况在过去几周中变得更加糟糕。)
The economy has continued to deteriorate. (经济继续恶化。)