deteriorates , deteriorating , deteriorated
If something deteriorates, it becomes worse in some way.
There are fears that the situation might deteriorate into full-scale war.
人们担心局势会恶化为全面战争。
Relations between the two countries steadily deteriorated.
这两个国家之间的关系持续恶化。
Surface transport has become less and less viable with deteriorating road conditions.
随着道路条件的恶化,地面交通变得越来越不可行。