- To generate pus; to become imflamed and suppurate; as, a sore or a wound festers ."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.]
- To be inflamed; to grow virulent, or malignant; to grow in intensity; to rankle.
Etymology: OE. festern, fr. fester (n.); or fr. OF. festrir, fr. festre (n.) See Fester (n.)