v. 溃烂；化脓；引起怨恨（fester的ing形式）

Fester \Fes"ter\, v. i. [imp. & p. p. {Festered}; p. pr. & vb.
n. {Festering}.] [OE. festern, fr. fester, n.; or fr. OF.
festrir, fr. festre, n. See {Fester}, n.]
1. 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.

2. To be inflamed; to grow virulent, or malignant; to grow in
intensity; to rankle.