fester
/ˈfɛstər/Definitions
1. verb
to become or remain in a state of decay or corruption
“The wound began to fester, and it was time for a doctor’s visit.”
2. verb
to remain in a state of anger or resentment
“His feelings had begun to fester, and he needed to talk to someone about it.”
3. noun
a sore or inflamed area of skin
“The infection left a festering wound on his arm.”
4. noun
a state of decay or corruption
“The festering conditions in the city’s slums were a major concern.”