FESTER

I. noun Etymology: Middle English, from Anglo-French festre, from Latin fistula pipe, fistulous ulcer Date: 14th century a suppurating sore ; pustule , II. verb (~ed; ~ing) Date: 14th century intransitive verb to generate pus, putrefy , rot , 3. to cause increasing poisoning, irritation, or bitterness ; rankle , to undergo or exist in a state of progressive deterioration , transitive verb to make inflamed or corrupt