/ˈfestə(r) ||; ˈfɛstɚ/verb[I] 1 (used about a cut or an injury) to become infected （指伤口）化脓: a festering sore/wound 化脓的伤口
2 (used about an unpleasant situation, feeling or thought) to become more unpleasant because you do not deal with it successfully （指难堪的情境、感觉或思想）变得更难堪或痛苦