Wounds immedicable Rankle, and fester, and gangrene.
--Milton.
Unkindness may give a wound that shall bleed and
smart, but it is treachery that makes it fester.
--South.
Hatred . . . festered in the hearts of the children
of the soil. --Macaulay.
2. To be inflamed; to grow virulent, or malignant; to grow in
intensity; to rankle.