VERB
(局勢、問題或情感)惡化，激化,加劇
If you say that a situation, problem, or feeling is festering, you disapprove of the fact that it is being allowed to grow more unpleasant or full of anger, because it is not being properly recognized or dealt with.
例句
Resentments are starting to fester.
仇恨開始日益加深。
...festering wounds of the legacy of British imperialism.
英帝國主義遺留的日益惡化的創傷