fester
verb- [intransitive]
(of a wound or cut 伤口或破口 to become painful and infected (= full of bacteria) 化脓；溃烂 festering sores/wounds 脓疮；化脓伤口 If you don’t take the splinter out, it will fester. 如果你不把碎片取出来，它会化脓的。
- [intransitive]
(of bad feelings or thoughts 不快的情感或思想 to become much worse because you do not deal with them successfully 更加苦恼；愈益恶化 Instead of talking the matter over with him, she allowed her resentment to fester in her mind. 她没有和他讨论这件事，而是任由自己的怨恨在心中滋长。
Word Originlate Middle English: from the rare word fester ‘fistula’, later ‘festering sore’, or Old French festrir (verb), both from Old French festre (noun), from Latin fistula ‘pipe, reed, fistula’.