deteriorate ·verb

病人的健康状况在一夜之间恶化，需要立即进行干预。

The patient's health ___deteriorated overnight, requiring immediate intervention.

如果沟通中断，关系将会迅速恶化。

If communication breaks down, the relationship will quickly ___deteriorate.

如果没有适当的维护，这栋老建筑的结构将持续恶化。

Without proper maintenance, the old building's structure will continue to ___deteriorate.