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English definition of “fester”

fester

verb [I]     /ˈfestər/
FEELING If a bad feeling or situation festers, it becomes worse over a period of time: Hatred between the two groups has festered for years.Deteriorating and making worse
INJURY If an injury festers, it becomes infected: a festering woundDeteriorating and making worse
(Definition of fester verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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