fester

1. V-I 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. 惡化[表不滿]

Resentments are starting to fester. 仇恨正開始逐步加深。

2. V-I If a wound festers, it becomes infected, making it worse. 化膿

The wound is festering, and gangrene has set in. 傷口在化膿，繼而發生了壞疽。