Fester | Mean of fester in English Dictionary

/ˈfɛstɚ/

• Verb
• to become painful and infected
1. His wounds festered for days before he got medical attention.
2. a festering sore
• to become worse as time passes
1. His feelings of resentment have festered for years.
2. We should deal with these problems now instead of allowing them to fester.