Fĕs'ter1, v. i.
v. i. [imp. & p. p. FESTERED; p. pr. & vb. n. FESTERING.] [A modification of foster, to feed, to nourish. Cf. A.-S. fester, food, equivalent to fostre, festre, nurse, equivalent to fostre. See FOSTER.]
Sense 1. To grow virulent; to corrupt; to rankle;—said of wounds and of a person wounded.
Wounds immedicable Rankle, and fester, and gangrene. Milton.
Sense 2. To become malignant and invincible;—said of passions.