festered; festering
ˈfe-st(ə-)riŋ 
1
: to generate pus
The wound became inflamed and festered.
3
a
: to cause increasing poisoning, irritation, or bitterness : rankle
dissent festered unchecked
His resentment festered for years.
b
: to undergo or exist in a state of progressive deterioration
allowed slums to fester
: to make inflamed or corrupt
: a suppurating sore : pustule
Did you know?
Both noun and verb forms of the English word fester come from the Latin noun fistula, meaning “pipe” or, less pleasantly, “fistulous ulcer.” Accordingly, the noun fester refers to a sore that forms or discharges pus, while the oldest sense of the verb fester means “to generate pus.” A boil, for example, is a festering infection of a hair follicle. Over time, the verb—as many words do—picked up a figurative sense, and fester began to be used not only for the worsening of a wound but for a worsening state, situation, etc.
Examples of fester in a Sentence
Verb
His wounds festered for days before he got medical attention.
His feelings of resentment have festered for years.
We should deal with these problems now instead of allowing them to fester.
Noun
pus oozed out of the fester
Recent Examples on the Web
Jessica Mathews, Fortune, 3 Apr. 2026
For years, this debate between stricter codes and affordable housing festered behind the scenes, including at the obscure International Code Council, which brings together government officials, contractors, appliance makers and others to lay the groundwork for model codes.
—The Editorial Board, Chicago Tribune, 30 Mar. 2026
For the families of the disappeared, the festering grief from not knowing the fate of a son, brother or father was compounded by threats from authorities displeased with anyone scrutinizing their behavior.
—Nabih Bulos, Los Angeles Times, 30 Mar. 2026
The controversy stretches back years, but festered under ex-President Andrés Manuel López Obrador, who was in office from 2018-2024.
—ABC News, 27 Mar. 2026
See All Example Sentences for fester
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Verb
But the outcry marked a tidal shift in sentiment and exposed long-festering resentments.
—Jessica Mathews, Fortune, 3 Apr. 2026
For years, this debate between stricter codes and affordable housing festered behind the scenes, including at the obscure International Code Council, which brings together government officials, contractors, appliance makers and others to lay the groundwork for model codes.
—The Editorial Board, Chicago Tribune, 30 Mar. 2026
For the families of the disappeared, the festering grief from not knowing the fate of a son, brother or father was compounded by threats from authorities displeased with anyone scrutinizing their behavior.
—Nabih Bulos, Los Angeles Times, 30 Mar. 2026
The controversy stretches back years, but festered under ex-President Andrés Manuel López Obrador, who was in office from 2018-2024.
—ABC News, 27 Mar. 2026
See All Example Sentences for fester
Cite this Entry
“Fester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fester. Accessed 6 Apr. 2026.
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