0 past simple and past participle of fester --
1 If a cut or other injury festers, it becomes infected and produces pus: --
a festering sore
2 If an argument or bad feeling festers, it continues so that feelings of hate or lack of satisfaction increase: --
This sense of betrayal on the northerners has festered into a groundswell of mistrust by the population against virtually any overtures from the government to the rebels.
This album has festered on me.
This rage must have festered beneath that inexpressive exterior for years.
However, most of the participants were not fully satisfied, and grievances regarding the results festered until they exploded in world war in 1914.
As the problems have festered, extremism has grown on all sides and will continue to do so if there is not a firm and perceptible move towards a settlement.
The grievances have festered for seven or eight years.
The slur, the stigma, created a sore, which rankled and festered.
The consequence of his allowing this rebellion to succeed was that it grew and it festered.
