festering

fes·ter  (fstr)

v. fes·tered, fes·ter·ing, fes·ters

v.intr.

1. To generate pus; suppurate.

2. To form an ulcer.

3. To undergo decay; rot.

4.

a. To be or become an increasing source of irritation or poisoning; rankle: bitterness that festered and grew.

b. To be subject to or exist in a condition of decline: allowed the once beautiful park to fester.

v.tr.

To infect, inflame, or corrupt.

n.

A small festering sore or ulcer; a pustule.

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[Middle English festren, from festre, fistula, from Old French, from Latin fistula.]

Thesaurus

Noun	1.	festering - (medicine) the formation of morbific matter in an abscess or a vesicle and the discharge of pus suppuration, maturation medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques bodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity"
	2.	festering - a fluid product of inflammation sanies, suppuration, ichor, purulence, pus bodily fluid, body fluid, liquid body substance, humour, humor - the liquid parts of the body gleet - a thin morbid discharge as from a wound or especially chronic gonorrhea

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festering

adjective septic, infected, poisonous, inflamed, pussy, suppurating, ulcerated, purulent, maturating, gathering